Qatari Emir Sheikh Tamim bin Hamad Al Thani met with visiting Iraqi Prime Minister Ali Falih Al-Zaidi in Doha on Sunday, 19 July, calling for the full implementation of the US-Iran peace memorandum of understanding (MoU) and urging all parties to return to dialogue. The high-level meeting, confirmed by the Emiri Diwan — the administrative office of the Qatari emir — came as the fragile accord faces mounting strain from renewed hostilities across the region.

Key Outcomes of the Doha Meeting

Both leaders called on all parties to honour the commitments enshrined in the MoU and to pursue dialogue as the primary mechanism for de-escalation. A joint statement from the Emiri Diwan said the two sides emphasised the need to guarantee freedom of navigation in the Strait of Hormuz and to protect broader regional security and stability.

The meeting also covered bilateral Qatar-Iraq ties, with both sides exploring avenues to deepen cooperation across multiple sectors, according to the statement.

Background: The US-Iran Peace MoU

The United States and Iran signed the peace MoU in mid-June, with the two sides expected to begin negotiations toward a final agreement within 60 days of signing. The accord was widely seen as a diplomatic breakthrough after years of confrontation, particularly over Iran's nuclear programme and proxy conflicts across the Middle East.

However, the agreement has rapidly unravelled. Both Washington and Tehran have since exchanged rounds of attacks in the region, with Iran formally suspending its obligations under the deal. This comes amid a broader pattern of US-Iran agreements collapsing at the implementation stage — a cycle that has repeated itself multiple times since 2015.

Iran's Position: 'No News of Negotiations'

Iranian Deputy Foreign Minister for Legal and International Affairs Kazem Gharibabadi declared that Iran has ceased fulfilling its obligations under the MoU, asserting that Washington had violated 'all its commitments' under the deal. Speaking in an interview with state-run IRIB TV, Gharibabadi said Iran is now focused squarely on self-defence.

'What we are currently faced with is defending the country in a decisive manner,' he said. 'This time too, the Americans have already received their answer that these aggressive actions will lead nowhere. If they are wise, they should choose other solutions.'

He confirmed there is 'no news of negotiations,' effectively signalling a full freeze on diplomatic engagement.

Khamenei Declares Trump's Signature 'Worthless'

Iranian Supreme Leader Mojtaba Khamenei went further, stating that the US violation of the MoU had once again demonstrated that US President Donald Trump's signature is 'worthless and invalid,' according to Iranian state media. Khamenei made the remarks in a message to the Iranian people addressing the country's most pressing issues.

The statement marks one of the sharpest public rebukes by Tehran's top leadership since the MoU was signed, and signals that Iran's ruling establishment has closed the door — at least for now — on further diplomatic overtures from Washington.

What the Hormuz Warning Signals

The joint Qatar-Iraq call to protect navigation in the Strait of Hormuz is particularly significant. The strait is the world's most critical oil chokepoint, with roughly 20% of global petroleum trade transiting through it daily. Any disruption — deliberate or incidental — would send immediate shockwaves through global energy markets. Iran has previously threatened to close the strait during periods of acute tension with the West.

With the MoU now effectively suspended and both sides hardening their positions, the diplomatic window for a negotiated resolution appears narrow. Regional actors including Qatar and Iraq are increasingly stepping in to prevent a full breakdown — though their leverage over Washington and Tehran remains limited.