Speaking on "Fox News Sunday, " Secretary of State Mike Pompeo said withdrawing from the 2015 accord wasn't aimed at Europeans, but he didn't rule out the USA imposing sanctions on entities that continue to do business with Iran, even as efforts continue to strike a new deal.
Iran's foreign minister on Tuesday hailed talks with the European Union to try to find a way to rescue the Iran nuclear deal after the United States pulled out as a "good start". Whatever decided should preserve and guarantee Iran's rights.
Minister for trade and export David Parker last week said it was still unclear to the nations who remained in the nuclear agreement what exports or trade were at risk when associating with Iran.
European firms, especially those from France and Germany, rushed to invest in Iran following the 2015 agreement, under which Tehran agreed to freeze its nuclear programme in return for the repeal of punishing global sanctions.
"It's possible", he said.
The Foreign Secretary had said Britain continues to believe that the Iran nuclear deal "has value" as he arrived in Brussels for EU-hosted talks.
Zarif is in Brussels on the final leg of a whirlwind diplomatic tour to save the 2015 nuclear deal after the recent US withdrawal from the pact.
"Our trade with New Zealand is the importing dairy products from NZ, if they want to impose sanctions then they must ban the companies from exporting the commodities to Iran. The answer is no", Le Maire told reporters in Paris, adding that France won't accept the "vassalization of Europe" by US officials bent on reimposing sanctions on Iran.
The US, he said, is not going it alone on Iran.
Last Wednesday, United States President Donald Trump withdrew from the deal while calling it unfair and warned of severe consequences if Iran resumes its nuclear programme.
The United States on Sunday threatened to impose sanctions on European companies that do business with Iran, as the remaining participants in the Iran nuclear accord stiffened their resolve to keep that agreement operational.
In the heart of Europe, Mohammad Javad Zarif meet his counterparts from France, Great Britain and Germany, the European nations (as well as China and Russia) who together with Washington have signed the historic pact.
They include retaliatory sanctions, allowing the European Investment Bank to invest directly in Iran and co-ordinating euro-denominated credit lines from European governments.
Europeans have sought to play down expectations of Tuesday's meeting, stressing the enormous challenge of finding a way around U.S. sanctions punishing foreign businesses trading with Iran, which have global reach.
With withdrawal from the JCPOA, the USA has re-imposed the highest level of economic sanctions on Iran. "We will try to uphold our side of the bargain".
Following Tuesday's evening talks in Brussels, all 28 European Union leaders are expected to discuss their next steps at a summit in Sofia on Wednesday, but no decisions are expected.
Altmaier said there was a deadline of up to 90 days for foreign firms to comply with USA sanctions or face penalties.
Ominous was the response of Jean-Claude Juncker, president of the European Commission, who was quoted as saying the USA "no longer wants to cooperate with other parts in the world", and that it is now turning its back on multilateral relations "with a ferocity that can only surprise us". "We don't have much to threaten the Americans".