An Iranian negotiation delegation led by Deputy Foreign Minister Mohammad Baqer Qalibaf departed Switzerland for Tehran on Monday after 18 hours of intensive talks [1].

These negotiations represent a critical attempt to stabilize regional tensions through a joint memorandum of understanding. The talks focused on high-stakes issues including a Middle East cease-fire, the release of frozen Iranian assets, and mechanisms for oil exports [3].

The discussions were held in Switzerland with mediation provided by Pakistan and Qatar [4]. According to reports, the delegation engaged in a "marathon" of direct political discussions with the U.S. side [3].

Timeline details of the meetings vary across reports. Some sources said the negotiations began around 3 p.m. [2] and initially lasted approximately one and a half hours [2] before a 30-minute pause for consultations between the participating delegations [2]. However, other reports said the total duration of the intensive engagement reached 18 hours [1], [3], [4].

Despite the length of the summit, the Iranian side later refused to resume talks in the quadrilateral format [3]. The delegation returned to Tehran on Monday following the conclusion of the session [4].

The focus of the memorandum of understanding aimed to address the primary economic and security grievances of the Iranian government—specifically the recovery of assets and the ability to export oil—while simultaneously addressing the broader security architecture of the Middle East [3].

“The talks focused on a joint memorandum of understanding covering a Middle‑East cease‑fire, release of frozen Iranian assets, oil export mechanisms.”

The departure of the Iranian delegation after 18 hours of intensive talks, coupled with a subsequent refusal to continue in a quadrilateral format, suggests a stalemate or a significant disagreement over the terms of the memorandum. While the breadth of the agenda—covering both regional security and economic relief—shows a desire for a comprehensive deal, the breakdown in the meeting format indicates that the mediating parties and the primary negotiators have yet to find a sustainable path forward for a formal agreement.