Latest Iran conflict update: Trump says he is unconcerned if Tehran refuses to resume negotiations.

U.S. President Donald Trump said Sunday evening that he was unconcerned about whether Iran would return to negotiations after ceasefire talks over the weekend failed to produce an agreement.

He also confirmed that the United States intends to impose a blockade on the Strait of Hormuz starting Monday morning, accusing Iran of failing to honor its commitment to reopen the vital shipping route. Speaking to reporters at Joint Base Andrews, Trump stated that the U.S. would be fine even if Iran chose not to resume talks.

His remarks followed a report indicating that several countries are attempting to restart diplomatic efforts after lengthy discussions in Islamabad ended without a deal. Despite the breakdown, sources suggested that further negotiations could take place within days, while regional governments are working with Washington to extend a fragile two-week ceasefire.

The Islamabad meeting represented the highest-level direct engagement between U.S. and Iranian officials since 1979, with 21 hours of talks concluding without progress. Vice President JD Vance said the U.S. had clearly outlined its conditions, but Iran declined to accept them.

U.S. demands reportedly included ending uranium enrichment entirely, dismantling key nuclear facilities, surrendering enriched materials, reopening the Strait of Hormuz without fees, promoting broader regional stability, and ceasing support for groups such as Hezbollah and the Houthis. Iran, however, proposed limited enrichment or reducing its stockpile, but the two sides failed to reach a compromise.

In response to Trump’s blockade announcement, Iranian Parliament Speaker Mohammad Bagher Qalibaf warned that Iran would not back down under pressure, stating that any confrontation would be met with force.

The U.S. plans to enforce the blockade on all vessels entering or leaving Iranian ports from 10 a.m. ET on April 13, covering areas along the Arabian Gulf and Gulf of Oman. It remains unclear whether U.S. allies will participate. Trump also criticized NATO for its lack of involvement and said Washington is reassessing its relationship with the alliance.

Sources: Senad Karaahmetovic