The EU's statement on triggering the nuclear deal dispute mechanism is a passive measure, Iran's Foreign Ministry's spokesman said.
He added that Tehran is ready to welcome any measure based on goodwill to save the 2015 nuclear deal but will decisively respond to any destructive measure against it.
Earlier on Tuesday, France, Great Britain and Germany confirmed that they launched the Iran nuclear deal dispute mechanism.
"We have therefore been left with no choice, given Iran’s actions, but to register today our concerns that Iran is not meeting its commitments under the JCPoA (Iran deal) and to refer this matter to the Joint Commission under the Dispute Resolution Mechanism, as set out in paragraph 36 of the JCPoA," the three European states said in a joint statement.
They also said they were not joining a campaign to pressure Iran, but hoped to bring Tehran back to full compliance with the commitments under the nuclear deal.
The aim of the dispute mechanism is not to re-impose sanctions, EU's foreign minister Josep Borrell said, as quoted by Reuters. He added that there is no alternative to the Iran nuclear deal.
Meanwhile, a source in the Russian Foreign Ministry said that Moscow considers "unacceptable" that the UK, France and Germany have activated the Iran nuclear deal dispute mechanism.
"We reaffirm the stand that it is unacceptable to activate the mechanism under paragraph 36 of the JCPOA. We believe that the EU trio's actions are inadmissible, as they contravene the goals and the sense of the JCPOA," the source said.
Last week, the Elysee Palace's press office said that Paris, London and Berlin stayed "committed to JCPOA and its preservation" and "called on Iran to cancel all measures incompatible with the agreement."
Macron, Merkel and Johnson have been trying to save the JCPOA, which restricted Iran's nuclear program in exchange for sanctions relief after the US withdrew from it in May 2018 and Tehran gradually rolled back its commitments.
The JCPOA was signed in 2015 by Iran, China, France, Germany, Russia, the UK, the US, Germany, and the European Union. Under the deal, Tehran was obliged to scale back its nuclear program and downgrade its uranium reserves in return for sanctions relief.