The US will not interfere if Iran attacks Israel Through a series of messages exchanged via third parties, the United States and Iran have come to an understanding.
Iran assured the Americans it will not target U.S. facilities, and in turn the U.S. says it will not get involved if Iran retaliates against Israel.
Israel carried out the attack on the Iranian Embassy in Damascus, without consulting the United States.
Since the Embassy and the next-door Ambassador's residence are on the same compound which was bombed, they are both Iran Sovereign territory. Israel's attack was therefore an actual Act of War for which Iran has the right to respond with military force.