European officials have warned Iran that it needs to take specific actions to avoid the return of United Nations sanctions over its nuclear program. This warning came on Wednesday after a call between Iran, France, Germany, the United Kingdom and the European Union's top diplomat. Iran hasn't commented on the call. The "snapback" process is part of Iran’s 2015 nuclear deal. It is set to take effect at the end of September unless the U.N. Security Council intervenes. It would freeze Iranian assets abroad and halt arms deals, further impacting Iran's economy. This move could increase tensions between Iran and the West.