US-Iran tensions escalate again as diplomacy stalls and oil markets react

The fragile diplomatic opening between Washington and Tehran is once again showing signs of collapse. Over the weekend, Iran formally responded to the latest US proposals aimed at ending the Strait of Hormuz crisis and restarting negotiations over Tehran’s nuclear programme. 

President Donald Trump immediately rejected the response as “TOTALLY UNACCEPTABLE”, signalling that the current deadlock may deepen rather than ease. 

The exchange marks the latest escalation in a confrontation that has already disrupted global energy markets, paralysed maritime traffic in the Gulf and revived fears of a wider regional conflict involving Iran, Israel and the United States.

Although neither side appears ready to abandon diplomacy entirely, the negotiations increasingly resemble a strategic contest over leverage rather than a genuine attempt at compromise.

A widening gap between Washington and Tehran

According to emerging reports, Tehran’s response was transmitted through Pakistani mediators and focused primarily on sanctions relief, an end to the US naval blockade and recognition of Iran’s strategic position in the Strait of Hormuz. 

Iranian officials also reportedly demanded guarantees against future attacks and the release of frozen Iranian assets abroad. 

The US, by contrast, continues insisting on strict limits on uranium enrichment, external control over enriched uranium stockpiles and dismantlement of key nuclear infrastructure.

Trump has also linked any broader settlement to maritime security in Hormuz, where commercial shipping remains severely disrupted. 

The gap between the two positions remains substantial.

Iranian state-linked media portrayed Tehran’s proposal as “generous and responsible”, arguing that Washington was demanding unilateral concessions while maintaining military pressure. Trump, meanwhile, accused Tehran of continuing to “play games” and suggested the US could resume military operations if negotiations fail. 

Israeli Prime Minister Benjamin Netanyahu further hardened the atmosphere by insisting that no agreement could be considered credible while enriched uranium remained inside Iran and nuclear facilities continued operating. Israel continues to view any arrangement short of dismantlement as insufficient.

The Strait of Hormuz remains the central pressure point

Behind the diplomatic rhetoric lies the broader strategic reality shaping the crisis: control over the Strait of Hormuz.

The narrow maritime corridor carries roughly one fifth of global seaborne oil and LNG trade, making it one of the world’s most critical energy chokepoints. Since the escalation earlier this year, shipping traffic through the strait has fallen sharply amid Iranian restrictions, US naval operations and rising insurance risks for commercial vessels. 

Washington’s maritime campaign, known as “Project Freedom”, was initially intended to restore commercial navigation through escorted naval convoys. However, the operation has struggled to stabilise shipping traffic and has instead contributed to a broader militarisation of the Gulf. 

US Central Command says more than 50 vessels have already been intercepted or redirected as part of blockade enforcement operations. Around 20 US warships remain deployed in the region. 

Iran, meanwhile, continues using selective access restrictions and drone activity to maintain pressure without formally declaring a complete closure of the strait. Analysts increasingly describe the situation as a “double blockade”, with both Tehran and Washington imposing competing forms of maritime control. 

The confrontation is already affecting global markets. Brent crude rose above $104 per barrel after Trump rejected Iran’s latest proposal, while Saudi Aramco warned that oil markets may not stabilise before 2027 if the crisis continues. 

The longer the standoff lasts, the greater the economic consequences are likely to become, particularly for Asian economies heavily dependent on Gulf energy exports.

Diplomacy continues, but confidence is fading

Despite the aggressive rhetoric, neither Washington nor Tehran appears eager for full-scale war.

The United States faces growing domestic and international pressure to prevent a prolonged energy shock, especially ahead of Trump’s upcoming meetings with Chinese leadership. China remains one of Iran’s most important economic partners and retains significant influence over Tehran’s calculations. 

Iran, for its part, continues facing severe economic strain from sanctions, supply shortages and the maritime blockade. Reports from inside the country point to rising inflation, electricity shortages and worsening pressure on industrial production. 

This mutual vulnerability explains why diplomatic channels remain open despite repeated confrontations.

Ukraine diplomacy re-emerges alongside the Gulf crisis

The renewed Iran crisis is also unfolding alongside another major diplomatic effort involving Russia and Ukraine.

Over recent days, Russian President Vladimir Putin suggested that the war in Ukraine may be entering its “final phase”, although Kremlin officials later softened the remarks. Moscow has also reportedly shown openness to renewed negotiations involving European intermediaries, including former German Chancellor Gerhard Schröder. 

Meanwhile, US envoys Steve Witkoff and Jared Kushner are expected to travel again to Moscow as diplomatic contacts intensify despite continued ceasefire violations on the battlefield.

European officials now face simultaneous crises on two fronts: a renewed security confrontation in the Gulf and fragile diplomatic manoeuvring around Ukraine.

EU foreign ministers are meeting this week, while defence ministers from the so-called “Coalition of the Willing” are expected to discuss both maritime security and broader geopolitical coordination.

For European governments already struggling with energy security, defence spending and economic stagnation, the convergence of the two crises is becoming increasingly difficult to manage.

The broader risk for Western policymakers is that both conflicts are beginning to reinforce each other politically and economically. Rising oil prices strengthen inflationary pressures at a moment when Europe’s economic recovery remains weak, while simultaneous diplomatic crises stretch Western political attention and military resources.

The result is a growing sense that the international system is entering another period of prolonged instability, where temporary ceasefires and partial negotiations increasingly replace durable political settlements.