Has the US-Iran peace deal collapsed? What the Switzerland talks reveal

The United States-Iran peace agreement has not formally collapsed, but its implementation is now in serious danger after Iran briefly suspended direct negotiations in Switzerland, declared the Strait of Hormuz closed again and accused Washington of failing to stop Israeli attacks in Lebanon. Talks entered a second day at the Bürgenstock resort on June 22, 2026, with communication continuing through Pakistani and Qatari mediators after the Iranian delegation protested against new military threats from United States President Donald Trump.

The crisis developed less than a week after Washington and Tehran signed a 14-point memorandum intended to extend their fragile ceasefire, reopen the Strait of Hormuz and create a 60-day negotiating period covering sanctions, nuclear restrictions and regional hostilities. Iran argues that the United States breached the political bargain by allowing Israeli operations in Lebanon to continue, while Washington says Tehran must restrain Hezbollah and restore safe commercial passage through Hormuz.

Donald Trump intensified the breakdown risk during the opening day of negotiations by threatening renewed military action if Iran maintained restrictions in the strait or failed to control its regional allies. Vice President JD Vance adopted a more conciliatory position inside the negotiations, saying the administration wanted to transform relations with Iran and acknowledging that implementation would be difficult.

The talks have therefore moved into an unstable middle ground. The agreement remains legally and diplomatically alive, technical teams are still engaged and mediators continue carrying messages, but several of its central provisions are already being contested or ignored.

Has the United States-Iran peace deal actually collapsed after the Iranian walkout?

The latest verified position is that the deal has not formally ended. The Iranian delegation temporarily suspended direct talks after Trump issued new threats, but negotiations continued indirectly through Pakistan and Qatar and moved into a second day on June 22.

That distinction matters because several reports described the Iranian action as a walkout or collapse. A temporary withdrawal from the negotiating room is a serious diplomatic protest, but it is not the same as terminating the memorandum, abandoning the 60-day process or resuming full-scale war.

United States and Iranian officials continued discussing the Strait of Hormuz, Lebanon, sanctions and the nuclear programme after the interruption. Technical teams remained in Switzerland, while senior officials from both sides stayed connected to the process.

The danger is that the agreement may collapse through failed implementation even without either side formally cancelling it. Iran is restricting maritime passage that the memorandum was supposed to restore, while fighting in Lebanon continues despite provisions calling for hostilities to end across connected regional fronts.

The peace deal is therefore surviving procedurally while weakening operationally. The document remains in force, but the behaviour of the parties and their regional partners is moving away from the conditions required to make it credible.

Why did Iran suspend direct negotiations during the Switzerland talks?

Iran’s delegation objected to public threats issued by Donald Trump while Iranian officials were participating in negotiations led by Vice President JD Vance. Trump said the United States could strike Iran again and warned Tehran of severe consequences if it maintained restrictions in the Strait of Hormuz.

Iranian officials regarded the remarks as incompatible with negotiations conducted under a memorandum intended to stop military operations. Tehran’s position is that it cannot be expected to negotiate nuclear limits and regional concessions while the United States president openly threatens another attack.

The temporary suspension also reflected a wider Iranian concern about whether JD Vance and the negotiating team can deliver commitments made in Switzerland when Trump continues issuing more confrontational messages from Washington.

Vance attempted to limit the damage by saying Trump wanted a new relationship with the Iranian people and by presenting the difficult opening as part of a complicated diplomatic process. His comments suggested that the United States delegation was trying to keep the negotiations alive rather than treat the Iranian protest as a final rupture.

The contrasting messages created uncertainty over the United States negotiating position. Iran must decide whether commitments made by Vance, Steve Witkoff and Jared Kushner will remain valid when Trump publicly introduces military threats, toll proposals and additional conditions.

How has the Strait of Hormuz become the first major failure of the agreement?

Reopening the Strait of Hormuz was one of the most important immediate commitments in the memorandum signed by the United States and Iran. The waterway carries a major share of global seaborne oil and liquefied natural gas trade, making its status central to both regional security and the world economy.

Iran announced that it had closed the strait again after accusing the United States of failing to stop Israeli attacks in Lebanon. Washington disputed the claim of a complete closure, but shipping activity slowed sharply as operators assessed Iranian warnings and the risk of military escalation.

The dispute involves more than whether a limited number of vessels can physically cross. A waterway can remain technically open while becoming commercially unusable because shipowners, insurers and crews consider the security risk too high.

United States Central Command previously said dozens of merchant vessels had continued moving through the strait, but Iran retains the military capability to threaten passage using coastal missiles, drones, patrol craft and mines. Even without attacking a vessel, Tehran can reduce traffic by creating uncertainty over whether ships will be intercepted or targeted.

The memorandum was intended to replace this uncertainty with predictable access. Iran’s renewed closure declaration shows that the parties never established an enforcement mechanism accepted by both sides.

Why does Iran connect the Strait of Hormuz to Israeli military action in Lebanon?

Iran argues that the peace agreement covers a wider regional conflict rather than only direct military operations between Tehran and Washington. The memorandum reportedly called for hostilities to end across connected fronts, including Lebanon, where Israel and Hezbollah have continued exchanging attacks.

Tehran considers Hezbollah part of the regional deterrence system that protects Iranian interests and pressures Israel. Iran’s position is that it cannot reopen Hormuz and reduce its leverage while Israel continues striking Hezbollah positions and Lebanese territory.

Washington rejects the idea that Iranian compliance should depend entirely on Israeli actions. United States officials argue that Iran must restrain Hezbollah, while Israel says it retains the right to respond to attacks and eliminate threats near its northern border.

This creates a structural weakness because Israel and Hezbollah are not direct signatories to the United States-Iran memorandum. Washington can pressure Israel, and Tehran can pressure Hezbollah, but neither side has complete control over the military decisions of its partner.

Every Hezbollah attack can therefore produce an Israeli response, which Iran can then describe as an American failure to enforce the agreement. Every Iranian restriction in Hormuz can be presented by Washington as proof that Tehran is using regional violence to avoid its commitments.

Without a separate monitoring and enforcement system for Lebanon, the peace process will remain vulnerable to the next rocket launch, air strike or disputed ceasefire violation.

What happened to the promised sanctions relief and Iranian oil-export opening?

The agreement was expected to allow Iran to expand oil exports through sanctions waivers while creating a process for releasing or unfreezing Iranian financial assets. Tehran views these economic benefits as the compensation it must receive for reopening Hormuz, limiting military operations and accepting negotiations over its nuclear programme.

Iran entered the Switzerland talks demanding evidence that the United States would implement those commitments before Tehran moved into detailed nuclear negotiations. Iranian central bank and oil officials joined the delegation because the process requires practical decisions involving payments, shipping, banking access and the legal treatment of Iranian crude.

United States officials appear to favour phased implementation. Washington wants Iranian compliance on Hormuz, regional security and nuclear access before delivering the full economic benefits promised under the memorandum.

That sequencing dispute has affected earlier negotiations with Iran. Tehran fears that it will make irreversible concessions before receiving sanctions relief, while Washington fears that Iran will obtain money and market access before completing verifiable restrictions.

A draft sanctions waiver for Iranian oil exports would be an important sign of progress, but commercial trade also depends on banks, insurers, tanker operators and refiners believing the waiver will remain valid. Trump’s threats create doubt over whether permissions granted during the talks could be withdrawn soon afterwards.

Could Donald Trump’s threats restart direct military conflict with Iran?

Trump has repeatedly said that the United States could resume strikes if Iran closes the Strait of Hormuz, supports attacks by Hezbollah or fails to accept nuclear restrictions. His statements preserve military pressure as part of the negotiating strategy, but they also increase the possibility of miscalculation.

Iran may interpret the threats as preparation for an attack rather than bargaining language. Iranian forces could respond by placing missile units on higher alert, increasing naval activity or dispersing military assets, actions that United States intelligence might then interpret as signs of imminent aggression.

The risk becomes greater around the Strait of Hormuz, where American and Iranian forces operate in relatively confined waters. A warning shot, drone interception or attempted boarding of a merchant vessel could quickly create demands for retaliation.

Trump’s supporters argue that credible military pressure forced Iran to sign the memorandum and will prevent Tehran from delaying implementation. Critics argue that threatening negotiators while talks are underway undermines moderates, strengthens Iranian hardliners and makes compromise politically dangerous.

The United States has not announced a new military operation, and Iran has not declared the ceasefire over. However, the agreement’s deterrence structure is weakening because both sides are again discussing force before the first implementation round has been completed.

Why are Pakistan and Qatar essential to preventing a complete diplomatic breakdown?

Pakistan and Qatar are carrying messages between the delegations when direct contact becomes politically difficult. Their involvement allowed negotiations to continue after Iran temporarily withdrew from face-to-face discussions.

Pakistan has relationships with Iran, the United States, Gulf governments and regional military actors. Prime Minister Shehbaz Sharif and Pakistan’s senior military leadership have supported the 60-day process and helped create the diplomatic framework behind the memorandum.

Qatar has extensive experience mediating conflicts involving governments and armed groups that do not maintain normal diplomatic channels. It also has a direct economic interest in reopening Hormuz because Qatari liquefied natural gas exports depend heavily on the waterway.

The mediators can prevent a temporary dispute from becoming a formal termination by clarifying messages and proposing language that allows both sides to return without appearing to surrender.

Their influence has limits. Pakistan and Qatar cannot compel Israel to stop military operations, force Hezbollah to disarm or guarantee that Trump will avoid further threats.

The immediate value of mediation is keeping communication open while emotions and public rhetoric remain elevated. In a crisis involving nuclear facilities, missiles and a critical energy route, preserving contact is itself an important form of risk reduction.

What does the latest oil-price reaction reveal about market confidence in the deal?

Brent crude rose above $81 a barrel as negotiations opened under pressure from the Iranian closure announcement and Trump’s threats. The increase remained relatively limited, indicating that traders had not yet priced in a complete return to war or a sustained physical shutdown of Hormuz.

The market is distinguishing between political rhetoric and confirmed supply losses. Oil prices could remain contained while vessels continue crossing, Iranian exports resume and Gulf producers maintain deliveries.

A direct attack on a tanker, a mining incident or a broader suspension by shipping companies would produce a much sharper reaction. Liquefied natural gas markets could also respond rapidly because Qatar has fewer alternative export routes than some oil producers.

The peace agreement had initially reduced fears of a prolonged energy emergency. Its current instability has restored a risk premium even though the worst-case scenario has not materialised.

Energy markets will now watch vessel movements, insurance costs and terminal operations more closely than diplomatic statements. A joint announcement can improve sentiment, but sustained shipping activity is the evidence needed to show that the Hormuz commitment is working.

Can nuclear negotiations continue while the ceasefire provisions remain disputed?

The United States wants the 60-day process to produce restrictions on Iran’s nuclear programme, access for international inspectors and clarity over uranium stockpiles and enrichment capability.

Iran argues that substantive nuclear talks cannot proceed normally while the United States fails to deliver the immediate economic and security commitments contained in the memorandum. Tehran is attempting to make implementation of sanctions relief and the Lebanon ceasefire a condition for deeper nuclear concessions.

This creates a sequencing deadlock. Washington wants Iran to demonstrate compliance before receiving the most valuable benefits, while Tehran wants those benefits delivered before accepting intrusive inspections or long-term restrictions.

Technical teams can continue working even while political negotiations remain strained. They can discuss inspection procedures, enrichment limits, asset-release mechanisms and the wording of sanctions waivers without requiring an immediate final agreement.

However, technical progress cannot overcome a fundamental political breakdown. If Iran believes Trump is preparing another attack, it has little incentive to expose sensitive facilities. If Washington believes Iran is using Hormuz and Hezbollah to gain concessions, it will resist releasing funds or lifting sanctions.

What developments would confirm that the peace agreement has truly collapsed?

The clearest sign would be a formal statement from either Washington or Tehran terminating the memorandum or ending the 60-day negotiation period. Neither side had taken that step as talks moved into June 22.

A second indicator would be the departure of the senior delegations and technical teams without an agreement to meet again. Their continued presence in Switzerland shows that diplomatic work remains active despite the interruption.

A third would be renewed direct military attacks between the United States and Iran. Threats alone do not terminate a ceasefire, but air strikes, missile launches or naval combat would make the agreement extremely difficult to preserve.

A fourth would be sustained enforcement of a full Hormuz blockade. If commercial traffic stops and Iran begins intercepting or attacking vessels, Washington may conclude that the central immediate bargain has failed.

A fifth would be a major escalation between Israel and Hezbollah that draws Iranian and United States forces into direct involvement.

Until one or more of these events occurs, the most accurate description is that the agreement is close to breakdown but has not formally collapsed.

What could save the United States-Iran agreement during the second day of talks?

The parties need a limited implementation package rather than an immediate comprehensive settlement. A practical first step could involve verified maritime access through Hormuz in exchange for a clearly defined United States sanctions waiver covering specified Iranian oil shipments.

The mediators could also establish a Lebanon monitoring mechanism that records ceasefire violations without automatically suspending every other part of the agreement. This would prevent one disputed strike from closing the strait or ending nuclear discussions.

Trump and Iranian officials would need to reduce public threats while negotiations continue. Neither side must abandon its military deterrence, but language suggesting that negotiators may be attacked or unable to return home safely makes direct diplomacy nearly impossible.

A timetable for releasing a portion of frozen Iranian funds could provide Tehran with evidence that economic commitments are real. In return, Iran could permit inspectors to begin preliminary access to nuclear sites or provide updated information about uranium stockpiles.

Such measures would not create permanent peace. They would demonstrate that the memorandum can produce reciprocal actions and buy time for more difficult negotiations.

What are the key takeaways from the crisis surrounding the United States-Iran peace deal?

• The United States-Iran peace agreement had not formally collapsed as of early June 22, 2026, although Iran temporarily suspended direct negotiations after Donald Trump issued renewed military threats during the Switzerland talks.
• Talks entered a second day at Bürgenstock, with Pakistani and Qatari mediators continuing communication between the parties and technical teams remaining engaged on sanctions, nuclear restrictions, Lebanon and maritime security.
• Iran declared the Strait of Hormuz closed again because it believes the United States failed to stop Israeli attacks in Lebanon, directly challenging one of the memorandum’s most important immediate commitments.
• Washington disputes the claim of a complete closure and argues that Iran must restore commercial passage and restrain Hezbollah before receiving the full sanctions relief and financial benefits promised under the agreement.
• Donald Trump’s threats to strike Iran again created a visible division between his confrontational public messaging and JD Vance’s attempt to present the negotiations as an opportunity to transform relations.
• The agreement’s survival depends on whether the parties can deliver a limited reciprocal package involving Hormuz access, Iranian oil-export waivers, partial asset relief and initial nuclear-inspection measures.
• Brent crude moved above $81 a barrel as markets restored part of the geopolitical risk premium, although prices did not indicate that traders expected an immediate full-scale war or complete energy blockade.
• The peace deal should be considered at severe risk rather than formally dead, with its fate likely to be determined by the second day of negotiations, shipping activity and developments in Lebanon.