P5+1

thumb|245px|The foreign ministers of the P5+1 nations, the High Representative of the European Union for Foreign Affairs, and the Iranian foreign minister in November 2013, when the [[Joint Plan of Action, an interim agreement on the Iranian nuclear program, was adopted in Geneva]] thumb|245px|The representatives from the P5+1 countries and the European Union and [[Iran announcing the nuclear agreement framework in Lausanne on 2 April 2015. The framework became the basis for the Joint Comprehensive Plan of Action (JCPOA), which was agreed on 15 July 2015, from left to right: Chinese ambassador to the United Nations Wu Hailong, French foreign minister Laurent Fabius, German foreign minister Frank-Walter Steinmeier, EU High Representative of the European Union for Foreign Affairs Federica Mogherini, Iranian foreign minister Mohammad Javad Zarif, Russian deputy political director Alexey Karpov, British foreign secretary Philip Hammond and US secretary of state John Kerry; Lausanne, Switzerland on 2 April 2015]]

The P5+1 refers to the UN Security Council's five permanent members (the P5); namely China, France, Russia, the United Kingdom, and the United States; plus Germany. The P5+1 is often referred to as the E3+3 by European countries. It is a group of six world powers which, in 2006, joined in diplomatic efforts with Iran with regard to its nuclear program.