The 2016 attack on the Saudi diplomatic missions in Iran was a mob action on 2 January 2016 by protesters against the execution of a prominent Saudi Arabian Shi'a cleric. Mobs stormed the embassy in Tehran and the Saudi consulate in Mashhad and ransacked them. The embassy building was set on fire with Molotov cocktails and petrol bombs. During the attacks, the police arrived and dispersed protesters from the embassy premises and extinguished the fire.

Iran and Saudi Arabia are engaged in an ongoing struggle for influence in the Middle East and other regions of the Muslim world. The two countries have provided varying degrees of support to opposing sides in nearby conflicts, including the civil wars in Syria and Yemen; and disputes in Bahrain, Lebanon, Qatar, and Iraq. The struggle also extends to disputes or broader competition in other countries globally including in West, North and East Africa, South, Central, Southeast Asia, the Balkans, and the Caucasus.