On Sunday, as Israel launched further strikes on Beirut, Trump urged moderation while negotiators attempted to complete an initial truce between Iran and the United States to conclude the three-month regional hostilities. The president minimized the significance of recent Israeli military actions while calling for de-escalation by all parties, noting that a regional peace agreement, which would extend to Lebanon, is nearing completion. Both sides must halt hostilities, with Israel ending operations throughout Lebanon and Hezbollah ceasing strikes on Israeli territory. The president wrote on his social media platform that this moment presents an opportunity for lasting peace that should not be squandered.

Earlier on Sunday, Trump had indicated the possibility of reaching an agreement with Iran, yet by evening in the region, no accord had materialised. Officials in Iran indicated they would respond militarily following an airstrike on a Beirut suburb that leveled a structure, resulting in three fatalities and six wounded. According to Israeli authorities, strikes were conducted against high-ranking Hezbollah officials following the firing of three rockets toward northern Israel by the group, which maintains ties with Iran.

An operation conducted seven days earlier in Lebanon's capital by forces from Israel led to a brief escalation of hostilities between the two nations, temporarily affecting diplomatic discussions between Tehran and Washington. In a social media post on Sunday, Mohammad-Bagher Ghalibaf, who serves as Iran's parliamentary speaker and participates in negotiations for Tehran, stated that Israeli attacks on Beirut indicate the United States may not possess sufficient determination or capacity to honour its agreements, and noted the attacks might jeopardise the concluding phase of discussions. The official Mizan news agency reported that the deputy commander of Iran's joint command headquarters stated these acts would receive a response.

Iran has stated that any settlement must encompass "all fronts," including hostilities in Lebanon, where Israel has conducted a wide-ranging operation and taken control of territory in the southern region, with sources indicating scepticism about whether Washington will restrain Tel Aviv. HA Hellyer, a regional analyst at the Royal United Services Institute thinktank in London, observed that Tehran prioritises Hezbollah over Lebanon itself, while internal opponents within Iran resist reaching an agreement.

Mediators from Qatar went to Tehran on Sunday to complete negotiations on a memorandum of understanding that will be signed digitally, according to local authorities. According to preliminary reports, the tentative deal would require Iran to restore full maritime access through the Strait of Hormuz, a waterway that transported roughly one-fifth of global oil and liquefied natural gas before hostilities began. Concurrently, Washington would end its sanctions regime against Tehran and permit Iranian oil exports, offering economic respite to the nation's struggling financial system. The document, however, omits discussion of more divisive matters including the nuclear programme, which negotiators plan to tackle in a two-month negotiation phase before reaching a broader agreement.

Experts have raised questions about the feasibility of completing complex negotiations within a two-month period, pointing out that the 2015 accord between the two nations—which curtailed Iran's nuclear program in return for sanctions relief—took almost ten years to negotiate with large teams of experts, and a policy institute researcher has indicated skepticism about achieving a full agreement in such a short timeframe.

Responses in Israel to the general framework of the developing agreement have included considerable apprehension over provisions that would not require Iran to limit its ballistic missile programme or its backing of regional armed groups including Hezbollah. Israel's prime minister, Benjamin Netanyahu, has expressed support for Trump while contending with a challenging re-election campaign in the coming months.

On 2 March, missiles were launched from Lebanon into Israeli territory, occurring 48 hours following a joint operation by Washington and Tel Aviv that resulted in the death of Iran's then-leader, Ayatollah Ali Khamenei. Israeli forces have advanced further into Lebanon than at any time in more than 25 years, with observers describing the situation as a substantial setback. The situation has deteriorated entirely. In a piece for Maariv, a widely circulated newspaper, Avi Ashkenazi stated that Iran has gained substantially from recent developments. A former national security adviser to Netanyahu described the proposed agreement as an error in judgment.

Republican members of the party have also expressed concerns about the agreement as the party contends with elevated energy costs and an unpopular military engagement before upcoming congressional elections. Reopening the Strait of Hormuz would not immediately ease global economic pressures, according to economic forecasts. Ensuring that vessels stranded in the confined passage can transit safely remains uncertain, and months will be needed to restore facilities damaged in the fighting. The president plans to address the clearance of explosives from the waterway at the G7 meeting beginning Monday.