Gabriel's British counterpart, Boris Johnson, described the accord as "a crucial agreement that makes the world safer".
American analysts who have followed the nuclear agreement's path said Iran's escalating warnings to the United States were partly aimed at the other parties to the agreement - Britain, China, France, Germany and Russian Federation - in the hope that they would convince Mr. Trump that an American pullout could cause enormous harm. His decision is also further complicated by recent mass anti-government protests in Iran, made up mostly of youths complaining of economic hardship.
Zarif tweeted that the Brussels meeting had shown a "strong consensus" that Iran was complying with the pact, had the right to enjoy its economic benefits and "any move that undermines (it) is unacceptable". She said the deal "was working" and "delivering on its main goal, which means keeping the Iranian nuclear program in check and under close surveillance".
Appreciating Iran for inviting the French foreign minister to pay a visit to Tehran, Le Drian stated that he will fly to Iran soon. It's a way of stopping Iran from acquiring the nuclear weapons and as my colleagues have said Iran is in compliance with this agreement according to the International Atomic Energy Authority.
Foreign ministry spokesman Bahram Ghasemi said that withdrawal by the United States would lead to an "appropriate and heavy response", adding that "the USA administration will definitely regret it".
"In responding to developments in Iran, now and in the future, the USA should be careful not to take any steps that might undermine the JCPOA (nuclear agreement) which remains vital to US national security", it said.
Iran warned the world on Monday to prepare for the possible withdrawal of the United States from the landmark nuclear deal agreed in 2015.
The president is a fierce critic of the accord and refused to certify Iran's compliance with the deal at the last deadline in October. But Mr. Trump warned it remained a possibility.
Officials criticise U.S. policy on Iran and reinforce their position on 2015 nuclear deal, in apparent coordinated effort. Bob Corker (R., Tenn.) is said to be working with Senate Democrats on new legislation to hold Iran accountable for its ongoing ballistic missile construction and other rogue activities. "With relief on sanctions from United States and EU, Iran is biding its time, reaping the benefits from the deal and accruing assets until it is free to resume its prolific activities".
US officials and others familiar with the administration's deliberations told The Associated Press that Trump is likely to back the accord for now but that he may pair his decision with new, targeted sanctions on Iranian businesses and people.
And at a security conference in Tehran, the defence minister addressed a large crowd foreign dignitaries as well as allies in the region, saying American leaders are orchestrating artificial conflicts in the Middle East to create perpetual war as a way to sell weapons.