Ten years after the signing of the Joint Comprehensive Plan of Action (JCPOA), sweeping UN economic and military sanctions have once again been reimposed on Iran. The move comes as the UK, France, and Germany—the so-called E3 partners to the nuclear deal—activated the "snapback" mechanism, accusing Tehran of escalating its nuclear activities and failing to cooperate with international inspectors.
Escalation After Bombings
The sanctions re-emerged in a tense atmosphere. In June, coordinated airstrikes by the United States and Israel targeted several of Iran’s nuclear facilities and military installations, an attack that Tehran described as an "act of war." Following those strikes, Iran suspended inspections by the International Atomic Energy Agency (IAEA), arguing that the situation had fundamentally changed and that the nuclear agreement no longer had international legitimacy.
Iranian President Masoud Pezeshkian has repeatedly insisted that his country does not intend to build nuclear weapons, branding the renewed sanctions “unfair, unjust, and illegal.” Yet Western powers remain deeply skeptical.
A Deal Under Strain
The JCPOA, first struck in 2015, was hailed as a turning point in Iran’s relations with the West. It placed strict limits on Tehran’s nuclear program, including caps on uranium enrichment and restrictions on research and development. In return, sanctions were lifted, unlocking billions of dollars for Iran’s economy.
However, the deal began to unravel in 2018 when former U.S. President Donald Trump withdrew Washington from the agreement, calling it deeply flawed. Since then, Iran has gradually ramped up its nuclear activities, stockpiling enriched uranium far beyond JCPOA limits.
The June bombings by the U.S. and Israel were aimed at reversing some of that progress and punishing Tehran for its support of regional proxy groups hostile to Israel. While Trump claimed the strikes had caused “monumental damage,” independent analysts doubt they significantly slowed Iran’s nuclear ambitions.
European Response and Snapback Sanctions
In a joint statement, the UK’s Foreign Secretary Yvette Cooper, alongside her French and German counterparts, said they had “no choice” but to trigger the snapback procedure after Iran “repeatedly breached” its commitments.
“Iran has not authorised IAEA inspectors to regain access to its nuclear sites, nor has it provided the necessary reports on its stockpiles of highly enriched uranium,” the statement read.
Although IAEA inspections have reportedly resumed in recent days, European leaders argue that Iran’s refusal to engage in good faith has left diplomacy in peril. They stressed that the reimposition of sanctions “is not the end of diplomacy,” but warned Tehran against any further escalation.
Tehran’s Defiance
Iran’s foreign ministry dismissed the sanctions as illegitimate and vowed a “firm and appropriate response” to any attempts to undermine its sovereignty. President Pezeshkian has ruled out abandoning the Non-Proliferation Treaty (NPT) but warned that ongoing pressure could derail all future negotiations.
He also rejected a U.S. proposal that Iran hand over its stockpile of enriched uranium in exchange for a three-month exemption from sanctions, calling it a “trap” designed to place Tehran in perpetual vulnerability.
“Why would we put ourselves in such a noose each month?” he asked, reflecting Tehran’s frustration with what it sees as Western double standards.
Israel’s Position
Israel welcomed the return of sanctions, calling it a “major development in response to Iran’s ongoing violations.” Israeli officials urged the international community to use “every tool available” to ensure Iran is permanently prevented from acquiring nuclear weapons.
What Lies Ahead?
The reinstatement of sanctions marks another sharp downturn in relations between Tehran and the West. While the E3 insist that diplomacy remains possible, the gap between Iran’s demands—particularly guarantees against further attacks—and Western conditions for lifting sanctions appears wider than ever.
For now, the nuclear deal that once symbolized hope for a new chapter in international cooperation sits on the brink of collapse.
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