"We appreciate the opportunity to meet in Moscow and exchange views on the Joint Comprehensive Plan of Action (JCPOA), around which, to put it bluntly, the crisis situation has developed", Lavrov said while opening the meeting with Zarif.
Mohammad Javad Zarif will meet with his counterparts from Britain, France and Germany-the three European nations involved in the landmark deal who are incensed by Washington's abandonment of the pact. She also added that European Union and Iran would hold a meeting on JCPOA in Vienna next week at the level of political directors.
Part of the flaw with the Iran deal that President Trump rejected was it enticed Europe and the U.S. into economic relations with Iran that would work against holding the country accountable for violations of the agreement, Bolton said.
"I'm not the national security decision-maker", Bolton said, adding that Trump "makes the decision and the advice that I give him is between us".
The commission members were "very well aware that there is no one magic option which can be applied", said a senior European Union official, who added that measures would take time to come into effect.
Germany, the United Kingdom, and France have significant trade links with Iran and remain committed to the nuclear agreement.
National security adviser John Bolton arrives for a joint news conference between U.S. President Donald Trump and Germany's Chancellor Angela Merkel in the East Room of the White House in Washington, U.S., April 27, 2018.
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Iran has described the sanctions as illegal and has warned that if talks to rescue the accord fail, it would ramp up its nuclear program to a level more advanced than before.
US Secretary of State Mike Pompeo announced on Sunday that Washington wanted to work "closely" with its European partners to reach a new agreement on confronting Iran's "bad behavior" in wake of the US withdrawal from the 2015 nuclear deal. Following Trump's decision, the Treasury Department's Office of Foreign Assets Control sanctioned nine Iranian individuals and entities including those with links to Iran's Revolutionary Guard.
"I want to stress we are under no illusion about the stuff Iran gets up to in the region, in the Middle East".
The EU's energy commissioner is also traveling this week to Iran to discuss strengthening European energy support to Iran.
The EU, which with Germany, France, Britain, Russia, China and the United States signed the nuclear accord, does have some steps it can take to shield European business in Iran.
"We have to be realistic about the electrified rail, the live wire of American extraterritoriality and how (it) can serve as a deterrent to business", Johnson told reporters.
Measures could include retaliatory sanctions, allowing the European Investment Bank to invest in Iran and coordinating euro-denominated credit lines from European governments.
German exports to Iran totaled almost 3 billion euros ($2.3 billion) in 2017, while French exports soared from 562 million euros ($670 million) in 2015 to 1.5 billion ($1.8 billion) in 2017 and oil giant Total has pledged to invest some $5 billion in the South Pars gas field.