TEHRAN – Iran’s Parliament Speaker Mohammad Baqer Qalibaf on Tuesday denounced the European troika’s decision to trigger the snapback mechanism of sanctions as “illegal” and vowed that the Islamic Republic will soon announce a unified and decisive response.

“The three European countries, having failed to fulfill their obligations under the JCPOA, have no right to activate Paragraph 37 of the agreement,” Qalibaf said during a plenary session. “It is therefore an unlawful step to reinstate resolutions. Iran must take deterrent action to make this move costly and force the Europeans to reconsider their decision.”

His remarks came as lawmakers held a closed session lasting more than ninety minutes to assess the potential repercussions of the European move on Iran’s economy and other sectors.

Germany, France, and Britain — the three European signatories to the 2015 nuclear deal, known as the Joint Comprehensive Plan of Action (JCPOA) — announced last week they would invoke the snapback procedure. The mechanism, embedded in UN Security Council Resolution 2231, paves the way for reinstating pre-2015 sanctions against Iran within 30 days over claims of “significant non-compliance.”

Abbas Goudarzi, spokesperson of the Iranian Parliament’s presiding board, said lawmakers will examine various proposals in coordination with the Supreme National Security Council to determine Tehran’s course of action.

“Enemies must understand that the Parliament, the government, the Supreme National Security Council, and all institutions of the Establishment are united. Iran’s response to hostile actions will be reciprocal and deterrent,” Goudarzi stressed. He added that all political factions in the chamber agree the response should be decisive and impose heavy costs on those behind the move.

Goudarzi also said the issue of Iran’s withdrawal from the Nuclear Non-Proliferation Treaty (NPT) had been discussed in the session, but no decision has yet been made.

He added that if Iran were to leave the NPT, the Parliament would legislate accordingly in coordination with all branches of the Establishment, including the Supreme National Security Council.

Tehran has already taken the issue to the United Nations. In a letter dated August 28, 2025, the Iranian Foreign Ministry urged the UN Security Council and Secretary General António Guterres to reject what it called “unjustified political manipulation” and to uphold international law and the authority of the Council.

Foreign Minister Abbas Araghchi also told his European counterparts in a phone call that Iran will respond appropriately to their “illegal and unjustified action.”

Russia and China, both permanent members of the Security Council and parties to the JCPOA, have criticized the E3’s decision, warning that sanctions would harm Iran’s peaceful nuclear activities and risk further destabilization.

The dispute comes amid lingering fallout from Washington’s withdrawal from the JCPOA in 2018, when the Trump administration reimposed sanctions and launched its so-called “maximum pressure” campaign. In the years since, the European signatories have been accused of failing to honor their own commitments to preserve the deal.