The White House said yesterday it is studying the details of an Iranian ballistic missile test.
Iran is the subject of a United Nations Security Council resolution prohibiting tests of ballistic missiles designed to deliver a nuclear warhead.
Speaking to a joint news conference today with visiting French counterpart Jean-Marc Ayrault, Zarif said: "The missile issue is not part of the nuclear deal."
His remarks came after being asked if Iran has conducted a missile test recently.