The 2020 Nagorno-Karabakh ceasefire agreement was an armistice agreement that ended the Second Nagorno-Karabakh War. It was signed on 9 November by the President of Azerbaijan Ilham Aliyev, the Prime Minister of Armenia Nikol Pashinyan and the President of Russia Vladimir Putin, and ended all hostilities in the Nagorno-Karabakh region from 00:00, on 10 November 2020 Moscow time. The president of the self-declared Republic of Artsakh, Arayik Harutyunyan, also agreed to an end of hostilities.

Artsakh, officially the Republic of Artsakh or the Republic of Nagorno-Karabakh, was a breakaway state in the South Caucasus whose territory was internationally recognised as part of Azerbaijan. Between 1991 and 2023, Artsakh controlled parts of the former Nagorno-Karabakh Autonomous Oblast of the Azerbaijani Soviet Socialist Republic, including its capital Stepanakert. It had been an enclave within Azerbaijan from the 2020 Nagorno-Karabakh war until the 2023 Azerbaijani offensive, when the Azerbaijani military took control over the remaining territory controlled by Artsakh. Its only overland access route to Armenia after the 2020 war was via the 5 km (3.1 mi) wide Lachin corridor, which was placed under the supervision of Russian peacekeeping forces.