Pompeo said on Monday that Iran will suffer the toughest sanctions in history from the United States if it does not change the current behavior and course of action domestically and regionally.
Maas said he explained the German and European position in a frank, but constructive discussion with U.S. National Security Adviser John Bolton, arguing that it was important to avoid any resumption of Iran's nuclear activities.
"There is no doubt that the Americans will be defeated, provided Iranian officials fully perform their duties", Khamenei said in his first public comments since US Secretary of State Mike Pompeo listed 12 demands for Iran on Monday.
"The American leaders...have got this message that if they attack Iran, they will encounter a fate similar to that of Saddam Hussein", the IRGC said in a statement, according to a Reuters report.
"The Islamic Republic can not deal with a government that easily violates an global treaty, withdraws its signature and in a theatrical show brags about its withdrawal on television", Ali Khamenei said. European countries have also been rattled recently by Trump's decision to move the U.S. Embassy in Israel to Jerusalem.
Iran is all prepared to resume production of highly-enriched uranium, an Iran official said on May 22.
He also said European leaders were concerned about the future of the transatlantic relationship, but expected it to withstand differences over Iran and other thorny issues.
He noted that the current USA president would meet the same fate as his predecessors, like George W. Bush, the neoconservatives and Ronald Reagan, and will be lost in history.
The Iranian foreign minister asserted that the country sought nothing beyond what it has been allowed under the deal.
Iranian ground forces and its allied militias, including the Lebanese Hezbollah, have supported President Bashar al-Assad in Syria's seven-year-long civil war which has killed over 500,000 people.