Iran told the United States on Friday that it must ensure Israel halts its military operations in Lebanon before Tehran will proceed with formalizing the landmark ceasefire agreement signed earlier this week, signaling that the Lebanon front remains the single most volatile obstacle to a permanent end to the broader regional war.
Speaking on the third day after the US-Iran memorandum of understanding was signed electronically on June 17, Iran’s deputy foreign minister said Tehran is “ready to move forward” on diplomacy with Washington, but the war must end on all fronts. The official’s statement, carried by Iranian state media and confirmed through diplomatic channels, amounts to a direct condition: the United States must deliver a complete cessation of Israeli attacks on Lebanon, or the deal cannot advance.
The demand exposes the fragility of the US-Iran framework at a moment when both sides had hoped to pivot toward a 60-day negotiation period aimed at a permanent settlement. The MOU, signed between US President Donald Trump and Iranian leaders via Pakistani mediators, includes a clause addressing the cessation of Israeli aggression in Lebanon. But on the ground, diplomacy has struggled to keep pace with events.
A US official told Reuters that Israel and Hezbollah have agreed to a renewed ceasefire in Lebanon. Yet deadly Israeli attacks have continued. More than a dozen Israeli strikes were reported within minutes of the latest ceasefire coming into force, according to Lebanese security sources and local media. The pattern has become familiar since the first Israel-Lebanon truce was brokered in April. Each new cessation of hostilities has been followed by fresh strikes, eroding trust on all sides.
Iran’s position is unambiguous. The Lebanon front is inseparable from the Iran deal. Tehran views the conflict between Israel and Hezbollah as a direct extension of the US-Israeli war on Iran, and it has repeatedly insisted that any agreement that does not halt Israeli operations in southern Lebanon is unacceptable. Iranian Foreign Minister Abbas Araghchi stated earlier this week that the tentative deal requires a full Israeli withdrawal from Lebanon, a condition Israel has already rejected.
The diplomatic friction has already produced tangible consequences. Vice President JD Vance postponed a planned trip to Switzerland where a ceremonial signing of the MOU had been scheduled. The delay was widely attributed to the collapse of the latest Israel-Hezbollah ceasefire and the subsequent Iranian refusal to send senior negotiators to the table until the Lebanon situation is resolved.
Lebanon’s Prime Minister Najib Mikati and President Joseph Aoun have both expressed hope that the US-Iran agreement will bring a definitive end to the war between Israel and Hezbollah. Aoun said in a statement that he expects the deal to “close the file” on hostilities that have killed thousands and displaced more than one million people in Lebanon since Israel launched its ground invasion in March. But neither leader exercises direct control over Hezbollah’s military operations, and the group has rejected previous ceasefire frameworks that did not include a full Israeli withdrawal.
The standoff places Washington in an awkward position. Trump has publicly distanced himself from Israeli Prime Minister Benjamin Netanyahu’s conduct in Lebanon, telling reporters that Netanyahu “gets a little excited sometimes” and suggesting Israel adopt a “softer touch.” But the White House has offered no public mechanism for compelling Israel to halt operations that it insists are necessary to degrade Hezbollah’s military capacity.
Israel, for its part, was excluded from the US-Iran negotiations and has made no secret of its opposition to the framework. Israeli officials argue that the MOU grants Iran legitimacy without requiring it to curb its nuclear program or end support for proxy forces. On Lebanon, Israel maintains that it retains the right to strike Hezbollah targets regardless of any US-Iran agreement.
The G7 leaders, meeting in Evian-les-Bains, France, this week, called for an “immediate robust ceasefire” in Lebanon and welcomed the US-Iran deal as a foundation for broader regional stability. But their statement did not address the enforcement mechanism that Iran is now demanding.
For Tehran, the calculation is strategic. Walking away from the deal entirely would risk a resumption of full-scale US-Israeli military operations against Iran, including the potential destruction of its nuclear and energy infrastructure. But accepting a deal while Israeli bombs continue to fall on Lebanese towns would undermine the core rationale Iran has used to justify its regional posture: that it stands with its allies against Israeli and American aggression.
The next 48 hours are critical. With the 60-day negotiation clock yet to meaningfully start, Iran has effectively paused the process. The question now is whether Washington can deliver what Tehran is demanding: an end to Israeli attacks on Lebanon, and proof that the words on paper match the reality on the ground.