"The upholding of commitments by all sides is a necessary condition to continue rebuilding trust and allow for continued, steady and gradual improvement in relations between the European Union, its member States and Iran," the ministers said in a statement after an informal meeting in Brussels, AP reported.
In similar remarks on Sunday, the European Union's Diplomatic Chief Federica Mogherini said the Joint Comprehensive Plan of Action has been reflected in a UN Security Council resolution and cannot be dismissed by one government.
Iran and the Group 5+1 (Russia, China, the US, Britain, France and Germany), reached the comprehensive nuclear deal, known as the Joint Comprehensive Plan of Action (JCPOA), in July 2015 and implemented it in January 2016.
In a speech to the pro-Israeli lobby group AIPAC (American Israel Public Affairs Committee) in March, Trump declared that his "number-one priority” would be to "dismantle the disastrous deal with Iran."
After Trump's winning the election, Iran’s Foreign Minister Mohammad Javad Zarif said that Iran expects the new US administration respect the nuclear deal.