"We greatly value the JCPOA, the nuclear deal with Iran, we think it is a considerable diplomatic accomplishment, it's a way of stopping Iran from acquiring nuclear weapons and Iran is in compliance with this agreement according to the International Atomic Energy Agency", said Johnson, underlining that so far, no other alternative is on the table.
Boris Johnson, the British foreign secretary, who represented one of the three EU states in the meeting hosted by the European Commission took the stance that the U.S. must come up with a viable alternative before it can scrap the agreement.
By Friday, the president must either once again sign waivers on Iranian sanctions - and keep the nuclear accord alive - or refuse to sign, effectively terminating USA participation in the agreement and setting off an worldwide crisis.
Zarif noted in a tweet the "strong consensus in Brussels" that Tehran is respecting its obligations and that "Iran's continued compliance (is) conditioned on full compliance by the U.S".
One of the criticisms levelled at the nuclear deal is that it does nothing to address Iran's continuing ballistic missile programme and meddling in Middle East conflicts such as Yemen and Syria.
Foreign ministers of Germany, France and United Kingdom meet Iranian counterpart in Brussels. "If Trump unilaterally reimposes all the nuclear sanctions, it will allow the Iranian regime to blame the US for the regime's failures to address the grievances of those who are marching in the streets".More news: Syrian military offensive in Idlib worries France, needs Astana deal revered
"Iran's regime claims to support democracy, but when its own people express their aspirations for better lives and an end to injustice, it once again shows its true brutal nature", said a statement from the White House press secretary.
Iran has said that if the USA walks away from the agreement, it is ready to give an "appropriate and heavy response".
Officials from major world powers and Iran meet roughly every three to four months to assess implementation of the deal, which is monitored by the world's nuclear watchdog, the International Atomic Energy Agency.
The administration has not revealed its intentions, but the Iran unrest is seen as a possible pretext for blowing up the nuclear accord. Due to their ties to SBIG and Iran's ballistic missile program, the five sanctioned entities will be blocked from operating in US jurisdiction, and USA citizens are prohibited from doing business with them.
Some analysts are quick to note that the Iran deal as it is written does not preclude the United States or other world powers from exacting new sanctions against Iranian officials or entities - as long as the new sanctions are not tied to the nuclear dispute.
"Iranians are clearly anxious that this time Trump will pull the plug on the J.C.P.O.A.", Mr. Kupchan said in an email.
The US president is expected to continue to waive the sanctions, as allies hope he will, but could also bring in new financial punishments targeting Iran's military.
The Trump administration has already increased sanctions on Iran, unrelated to the nuclear agreement, for its missile program, terrorism financing and other destabilizing activities around the region.