Nuclear weapons and the weapons of mass destruction have triggered the arm race in the Middle Eastern region. The attainment of nuclear weapons of one state is highly influential to the others as these states are very close to each other. Iran has been struggling for the nuclear weapons from years, but these efforts are always curbed with the different regional circumstances which transformed this issue into the most controversial issue in the international arena. In this regard Joint Comprehensive Plan of Action, which was the example of the diplomatic negotiation between Iran and P5+1, was the landmark deal in the revival of the relations between United States and Iran. The consequent withdrawal of United States from the deal have devastating effects on the Iranian economy with the re-imposition of sanctions. This thesis seeks to shed light on the Iran strategy to support its devastating economy and to attract the investors again in his country with recognition of the Iranian activities after the U.S withdrawal from JCPOA. This article includes the impact of United States withdrawal on escalating regional destabilization i.e., returning of the Iranian nuclear program. This article figures out international theories to give reasoning to the pursuit of the Iranian nuclear weapons and to evaluate the nuclearizing status in the international arena.

Key Words: Nuclearization, Neo-Realism and Nuclear Optimism, JCPOA Regional Instability.