**The absence of formal US-Iran diplomatic relations since 1979, compounded by renewed military conflict earlier in 2026 and persistent sanctions, underpins the 95.5% trader consensus against reopening a US embassy in Iran this year.** A June memorandum of understanding between the Trump administration and Iranian officials established a 60-day framework for talks on nuclear issues, sanctions relief, and Strait of Hormuz navigation, prompting some Western missions to resume operations in Tehran. However, those talks stalled amid resumed US sanctions actions, Iranian preconditions, and ongoing regional tensions, with the State Department maintaining a Level 4 travel advisory and confirming no physical US presence as of September. Switzerland continues to serve as the protecting power. Full embassy reopening would require a comprehensive normalization agreement resolving core disputes within the remaining months of 2026—a threshold few observers view as attainable given the current diplomatic impasse and security environment. Late breakthroughs in nuclear verification or sanctions waivers remain the primary variables that could alter the outlook.