The United States has reimposed restrictions targeting Iranian oil exports, prompting sharp criticism from Tehran and raising fresh questions over the future of the US-Iran memorandum of understanding. Iranian officials argue the move violates previous commitments, while Washington says it remains committed to pursuing a lasting peace agreement despite renewed pressure. The decision comes amid continuing tensions over maritime security in the Strait of Hormuz and broader regional stability. This report examines the latest developments, the competing narratives from Washington and Tehran, and what the renewed sanctions could mean for diplomacy, energy markets, and the fragile ceasefire process.