Germany’s foreign minister has issued an unusually blunt ultimatum to Tehran, demanding the immediate reopening of the Strait of Hormuz and a verifiable halt to Iran’s nuclear programme, as the Islamic Republic intensifies a frantic round of telephone diplomacy with capitals from Brasília to Tokyo. Speaking after a call with his Iranian counterpart Abbas Araghchi, Johann Wadephul described the closure of the strategic waterway as a threat to global economic stability and insisted that Iran “completely and verifiably” abandon any move toward weaponising its nuclear know-how. His statement, published on social media, explicitly aligned Berlin with Washington’s negotiating stance, underscoring the pressure that European allies are piling on Tehran even as they keep diplomatic channels open.

Araghchi himself has been the engine of this outreach, speaking by phone over the past days with the foreign ministers of France, Brazil, Italy, Japan and Germany, as well as with Qatar’s prime minister. In each conversation, he laid out what Iranian state media terms “initiatives to end the imposed war” – a phrase that frames the conflict as one instigated by the United States and Israel. From Paris, Jean-Noël Barrot expressed support for continued diplomatic efforts while urging a sustainable regional peace. Brazil’s Mauro Vieira, a representative of the Global South, heard Tehran’s pitch without publicly endorsing it, while Italy and Japan were briefed on the same themes of ceasefire and tension reduction. Viewed from Tehran, this is a bid to rally a broad coalition behind a narrative that shifts blame onto its adversaries and positions Iran as the party seeking a negotiated exit.

Yet the response from Berlin signals a hardening of demands that will be difficult for the Iranian leadership to meet. Wadephul’s call for the Strait of Hormuz to be “immediately” reopened directly challenges the military leverage Iran has wielded by disrupting the chokepoint through which a fifth of the world’s oil passes. His insistence on a verifiable nuclear stop mirrors the position of US President Donald Trump, who has repeatedly threatened to prevent Iran from acquiring atomic weapons. Analysts in London note that while Germany’s tone was sharp, it stopped short of threatening new sanctions or military action, leaving room for negotiation. The paradox is that the very diplomatic initiatives Araghchi is selling appear to require concessions on precisely the issues Berlin and Washington are pressing hardest.

Looking ahead, the success of this Iranian diplomatic offensive hinges on whether it can persuade enough partners to decouple the conflict narrative from the nuclear and maritime issues. Tehran’s strategy of targeting multiple audiences – from European allies wary of escalation to rising powers like Brazil and Japan that prize non-interference – may win rhetorical support but is unlikely to translate into substantive relief as long as the Strait remains blocked and centrifuges keep spinning. The coming weeks will test whether the flurry of phone calls can produce a tangible de-escalation, or whether the gulf between Iran’s framing of an “imposed war” and the West’s demands for verified compliance will widen into an irreducible deadlock.