Foreign Minister Mohammad Javad Zarif said on Sunday that the withdrawal from the Nuclear treaty was among "many options" for Iran.
"The options of the Islamic Republic are numerous and the authorities are looking at them ... and withdrawing from the nuclear weapon is one such possibility," Zarif was quoted as saying by state television.
Zarif's statement comes after Washington tightened sanctions on Tehran and what Iranian officials regard as a "European deficit" in implementing the comprehensive plan of action common to the nuclear deal.
"The European parties have not yet been able to implement their commitments under the nuclear agreement," Iranian ambassador to Paris Bahram Qasimi said Saturday. "The rapid steps and actions to be taken by the Europeans are a very serious and decisive criterion for the policies that Iran will follow."
Iran's parliament speaker Ali Larijani said the European Union had shown it was unable to secure international treaties. The Europeans promised to secure the nuclear deal but did nothing in practice.
Iran has repeatedly threatened to withdraw from the nuclear treaty if it finds no economic benefits from continuing to abide by it.