Efforts to advance the peace process between Iran and the United States were abruptly interrupted when both sides cancelled a impressive meeting in Switzerland. The Iranian delegation, scheduled to travel to Lucerne for technical negotiations on the recently signed memorandum of understanding, withdrew late Thursday. Within hours, the US team, led by Vice President J.D. Vance, also called off its participation. The cancellations followed a series of Israeli airstrikes on southern Lebanon that left at least 18 people dead, information from local media.
The escalation began when Israel launched a wave of attacks in response to a Hezbollah drone strike targeting Israeli troops inside Lebanon. The Israeli military reported that at least four soldiers had been lost, while pro-Hezbollah sources described direct clashes between militants and Israeli forces. Hostilities continued into Friday morning. The Israeli army said more than 100 missiles and drones had been launched in the ongoing operation.
The renewed violence has directly affected the fragile diplomatic process. The first article of the Iran-US memorandum calls for an end to all military operations, including those in Lebanon. Tehran reportedly told Washington and mediators that the situation in Lebanon is basic to continuing talks, describing Israel's actions as a clear violation of the agreement. The White House, the basic driver of the negotiations, did not initially comment on Iran's reasons for cancelling, but acknowledged the complexity and unpredictability of such diplomatic efforts. No new date for the meeting has been set.
The talks formed part of a broader 14-point structure covering nuclear issues and sanctions, alongside regional security and the Strait of Hormuz. In June 2026, the process included a high-level session at the Bürgenstock resort near Lake Lucerne, with Qatar and Pakistan acting as mediators and describing the outcome as “encouraging progress.” The next phase was intended to continue at the technical level. On June 21, Vice President Vance departed for Switzerland, saying discussions could last “a couple of days”; US envoys Steve Witkoff and Jared Kushner were already there.
Under the original plan, Iran and the US were to negotiate the memorandum's technical details over a 60-day period, with the option to extend the timeline if needed. The first round produced a roadmap toward a final agreement, not a completed settlement. The Economic Times reported that the agenda included maintaining the Lebanon ceasefire and keeping the Strait of Hormuz open, as well as addressing elements of a nuclear agreement. The reported structure also included a Lebanon deconfliction mechanism and a communication channel concerning Hormuz.
Lebanon was so basic to the diplomatic package, not separate from the negotiations. Earlier, the Lebanese presidency described Hezbollah’s response to a US proposal as a “reciprocal cessation of attacks.” Reports on the memorandum also outlined possible US sanctions relief and the release or availability of Iranian restricted assets. Iran, in turn, stated it would make “best efforts” to ensure safe passage for commercial shipping. The memorandum has been described as a set of political commitments, rather than a ratified peace treaty.
Iranian Foreign Minister Seyed Abbas Araghchi referred to the document as the “Islamabad Memorandum of Understanding,” saying it had “never been closer” to finalisation. Iran’s Foreign Ministry spokesperson Esmail Baghaei rejected claims that a final US-Iran agreement had already been completed. Israel has openly opposed the agreement. Prime Minister Benjamin Netanyahu, who has not participated in the talks, said Israel does not feel bound by the deal and will continue its military campaign in Lebanon as long as necessary.
The diplomatic rift has also exposed tensions between the US administration and Israeli officials. Vice President J.D. Vance publicly criticized Israeli government figures who oppose the Iran deal, warning against alienating Donald Trump, whom he described as Israel's last major ally. Recent polling by Pew Research Center indicates that a majority of Americans, including Jewish respondents, have little confidence in Netanyahu. The findings reflect a shift in US public opinion since 2022.
Meanwhile, Israel has intensified its lobbying efforts in the US, particularly among Republican and Christian audiences. Haaretz reported that the Israeli government has allocated over $40 million for an influence campaign and signed a new contract with a New York-based production company to promote pro-Israel narratives on social media. The approach marks a impressive change: even AIPAC, the largest pro-Israel lobby in the US, has issued statements supporting the Trump-brokered agreement, despite previously opposing similar deals.
The region has seen repeated cycles of violence involving Israel and Lebanon, alongside Iran-backed groups such as Hezbollah. Military escalations have often derailed diplomatic efforts. The negotiations could affect regional stability and international relations amid shifting US-Israel ties and changing American public opinion.
