0541 GMT July 21, 2018
"We really call on the US government to continue to certify and stay in this deal," Beatrice Fihn, director of the International Campaign to Abolish Nuclear Weapons (ICAN), told a news conference at the UN headquarters in New York on Monday, AFP reported.
"This is not really what the world needs right now...We see no evidence that Iran is not complying with it," she added.
The head of the anti-nuclear campaign group also on Friday chided Trump for ramping up a nuclear standoff and said the US president has a track record of “not listening to expertise”.
Speaking in the hours after the Norwegian Nobel committee made the ICAN its 2017 laureate, Fihn said Trump “puts a spotlight” on the dangers of nuclear weapons.
Trump is a stern critic of the 2015 accord, which he has called "the worst deal ever," and officials say he intends to tell US Congress next week that Tehran is not honoring its side of the bargain.
US officials insist this will not sink the deal itself but open the way for Congress to develop new measures against Iran.
The nuclear agreement was struck in July 2015 by Iran and five permanent members of the UN Security Council (Britain, China, France, Russia and the United States) plus Germany.
On Monday, the head of the UN nuclear watchdog said Iran was complying with the deal.
"I can state that the nuclear-related commitments undertaken by Iran ... are being implemented," International Atomic Energy Agency chief Yukiya Amano said, giving prepared remarks during a conference in Rome.