Iran has said on Sunday that it does not consider the time to be “suitable” for an informal meeting on the embattled 2015 nuclear deal, proposed by Europe and involving the US.

“Considering the recent positions and actions of the United States and the three European countries, (Iran) does not consider the time suitable to hold the informal meeting proposed by the European coordinator” of the deal, foreign ministry spokesman Saeed Khatibzadeh said in a statement.

Iranian officials had said Tehran was studying a proposal by European Union foreign policy chief Josep Borrell to hold an informal meeting with other parties to the nuclear pact and the United States, which reimposed sanctions on Iran after then-president Donald Trump quit the deal in 2018, Reuters reported.

Iran and the new U.S. administration of President Joe Biden have been at odds over who should take the first step to revive the accord. Iran insists the United States must first lift sanctions while Washington says Tehran must first return to compliance with the deal, which it has been progressively breaching.