Jan	Iran announced that it suspended the implementation of its obligations under the JCPOA regarding restrictions on centrifuges (9th) The United Kingdom withdrew from the EU and EURATOM (31st)
Feb	The P5 Conference in London (12-15th) IAEA International Conference on Nuclear Security in Vienna (10-14th) The 27th Asian Export Control Seminar in Tokyo (12-13rd) Ministerial Meeting of the Stockholm Initiative for Nuclear Disarmament in Berlin (25th)
Mar	NPT Review Conference was postponed due to the spread of COVID-19
Apr
May
Jun	U.S.-Russia Strategic Security Dialogue (22nd)
Jul	The United States ended exemptions on Iran sanctions (27th) Annual Meeting of the International Nuclear Security Education Network (INSEN)
Aug	Hiroshima Peace Memorial Ceremony (6th) Nagasaki Peace Memorial Ceremony (9th)
Sep	Meeting of the Commission for the Southeast Asian Nuclear Weapon Free Zone Treaty (SEANWFZ Commission) (online) (9th) 64th General Conference of the International Atomic Energy Agency in Vienna (21- 25th)
Oct	Arms embargo on Iran under the UN Security Council Resolution 2231 was lifted (18th) Treaty on the Prohibition of Nuclear Weapons reached 50 ratifications (24th) A further postponement of NPT Review Conference to August 2021 was decided
Nov	The United States conducted a subcritical nuclear test, named “Nightshade A” in the state of Nevada (2nd)
Dec