US-Iran diplomatic frictions have intensified following the October 2026 UN General Assembly, where Washington directed Iran's delegation to depart and later reported removing two members who remained beyond the deadline, actions Iran described as routine departures rather than expulsions. This builds on prior US measures, including the December 2025 removal of Iran's deputy UN ambassador on national security grounds and additional diplomat actions in 2025-2026. Lebanon declared Iran's ambassador persona non grata in March 2026, though Tehran maintained the envoy's presence. Broader tensions tied to regional conflicts, proxy dynamics, and sanctions enforcement continue to shape bilateral relations, with potential for further diplomatic measures by the US or other states depending on upcoming negotiations, security developments, or responses from Tehran. Trader consensus reflects these enforcement patterns and ongoing strains.