Korean businesses will then have great difficulty in trading with Iran.
The EU hopes to convince Iran to continue to respect the landmark nuclear pact.
While Ushakov noted that the pact's signing had been planned for long time, the move coincides with the U.S. exit from the 2015 nuclear deal with Iran that set the stage for re-imposing painful economic sanctions against Iran and rattled many USA allies.
The major force that could hold the region back from all-out war is Russian Federation, said Boston College political science professor Ali Banuazizi.
Riedel added that Trump is now "only a few days away from throwing another can of gasoline on the fire by moving the embassy to Jerusalem". But if it fails to qualify for an exception to the sanction this time around, Korea may have to stop importing oil from Iran and Korean businesses may not be allowed to settle accounts with their Iranian counterparts in Korean won. "We focus on these statements while assessing Iran's approach to this issue", he added. Judging from his words - and those of national security adviser John Bolton - the new White House goal is to facilitate regime change in Tehran.
The issue has been so thorny and emotionally fraught that worldwide negotiators had left the question of Jerusalem to the final stages of any peace deal.
Iran has said it had asked Europe's Airbus to announce whether it would go ahead with a plane deal with Tehran following the USA pull-out.
In the wake of Trump´s decision on the JCPOA, there was a flurry of articles in key media outlets such as Financial Times, Washington Post, Foreign Policy, and others calling for a thorough re-evaluation of Europe´s relations with the US.
"The Israelis are obviously desirous of this, and they've requested this, and they're very happy by it", Friedman said.
"The circumstances in I'm in now is that I'm the national security adviser to the president. We have no illusions about Iran's disruptive behavior but we think we can tackle those in other ways", Johnson said. "Too early to judge", he said. "It's a UN Security Council Resolution and it belongs to the entire world".
The region is already on edge.
Most upsetting was the lack of any serious European diplomacy with Iran between Trump's January 12 ultimatum and the May 8 decision. The White House said both condemned the rocket attacks. The foreign ministers of the three European powers will meet their Iranian counterpart in Brussels on Tuesday to discuss a way forward. In exchange, the signatories of the deal agreed to lift sanctions that had crippled the Iranian economy for years.
A US domestic law called the National Defense Authorization Act bans many countries from trading with Iran. Moscow has previously stated its strong support for the agreement.
Press Secretary Sarah Huckabee Sanders says in a statement that the "information provides new and compelling details about Iran's efforts to develop missile-deliverable nuclear weapons".
In a phone call dominated by Iran, the Prime Minister and President agreed to hold talks between the United Kingdom and USA governments on the effect ofsanctions on British companies.
Zarif will later fly to Moscow and Brussels.
He also called on the worldwide community to prevent Iranian "Al Quds" forces from basing in Syria.
As part of the supply deal, OPEC pledged to cut 1.2 million bpd from supplies from its members. "We will not let Iran base herself in Syria".
Tehran, which has sought to avoid an escalation in regional conflict that could alienate its European partners, has not commented on whether its forces were hit.
"I'm not doubting the good intentions of France, Germany and Britain and Canada - they have no leverage, now they do", Barkan said in an interview.
Ushakov said Putin will discuss the United States withdrawal from the Iranian deal with German Chancellor Angela Merkel and French President Emmanuel Macron, who are set to visit Russian Federation later this month.
Meanwhile, the US government tried to further pinch Iran's finances by disrupting a currency exchange network allegedly used to transfer millions of dollars to Iran's Revolutionary Guard.