Sanctioning Transfers and Outbound Products to Iran Act of 2023 or the STOP Iran Act of 2023 This bill mandates that the Department of Commerce require a license for the export, reexport, or in-country transfer of emerging and foundational technologies to certain Iranian persons. (Generally, such technologies are those identified by a federal interagency process to be essential to U.S. national security.) The Iranian persons subject to this bill are Iranian individuals or entities that are subject to U.S. sanctions and provide support to certain organizations, including (1) the Islamic Revolutionary Guard Corps and the Armed Forces of Iran, (2) any organization designated as a foreign terrorist organization, and (3) any entity engaged in hostilities with a partner or ally of the United States.