The announcement of the peace deal between the United States and Iran on Sunday evening was welcomed by the United Nations and European and regional countries, in a move seen as an important shift toward de-escalating one of the Middle East's most sensitive hotbeds of tension and reopening the Strait of Hormuz to international navigation after months of turmoil.

In a statement issued by the Office of the Spokesperson for the UN Secretary-General, António Guterres expressed his "pleasure" at the agreement, praising the role played by Pakistan, Qatar, Egypt, Saudi Arabia, Turkey and other countries in supporting the negotiations. The statement stressed that the reopening of the Strait of Hormuz represents an essential step to stabilize global supplies and protect the international economy.

In Ankara, Turkish President Recep Tayyip Erdogan described the memorandum of understanding as an "important development" to consolidate regional peace, calling on the parties to avoid any steps or statements that could re-establish tension before the official signing date. Erdogan praised Pakistan's mediation and the support provided by Qatar and Saudi Arabia to the diplomatic track, stressing his country's commitment to continue supporting all efforts aimed at stabilization.

In London, British Prime Minister Keir Starmer called the deal "a very important step to end the war and achieve regional stability," stressing the need for Iran to abide by its nuclear commitments, and congratulating Washington and regional mediators, stressing that Britain will continue to support any path that prevents the spread of nuclear weapons.

In Paris, French President Emmanuel Macron welcomed the new understanding, stressing that the "urgent and unconditional" reopening of the Strait of Hormuz is an indispensable necessity for the stability of the region and the global economy. He stressed the importance of ensuring freedom of navigation and not imposing any restrictions on transit fees.

Qatar joined the wave of welcome, calling the agreement "an important step towards sustainable peace", and called on all parties to engage in the upcoming negotiations in a positive spirit, and the Qatari Prime Minister reiterated his appreciation for Pakistan's role and regional support that contributed to creating the conditions for the completion of the agreement.

In Cairo, the Egyptian Foreign Ministry described the agreement as a "very important development" to restore regional and international security, and to redirect attention to the humanitarian situation in Gaza and the West Bank, and expressed hope that the agreement would mark a turning point towards strengthening trust and laying new foundations for cooperation.

At the broader European level, the leaders of France, Germany, Italy and Britain issued a joint statement welcoming the deal, calling for the "urgent and unconditional" reopening of the Strait of Hormuz, and reaffirming their readiness to lift sanctions related to Iran's nuclear file, provided Tehran takes clear and verifiable steps. They also stressed their commitment to work with the United States, Iran and the International Atomic Energy Agency to ensure that Iran does not acquire a nuclear weapon.

With this broad welcome, the U.S.-Iran deal appears to have opened a new window to reduce regional tensions and revived hope that a more stable diplomatic path can be built in a region that has long been on the brink of exploding.