Iran has suspended commitments under the 2015 international nuclear deal. The deal was aimed at curbing Iran’s nuclear ambitions in return for sanctions relief. Iran-US tensions have risen since Trump Administration quit. President Hassan Rouhani said he would keep enriched uranium stocks in the country rather than sell them abroad. He also threatened to resume production of uranium enriched to a higher level in 60 days.

Foreign Minister Javad Zarif said in a tweet that Iran was acting within its rights under the deal and it was up to the three European powers to act:

On May 8 2018, US withdrew from #JCPOA, violated #UNSCR 2231 & pressured others—incl #E3—to do the same
After a year of patience, Iran stops measures that US has made impossible to continue
Our action is within the terms of JCPOA.
EU/E3+2 has a narrowing window to reverse this.