The COVID-19 pandemic in Brunei is part of the worldwide pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The virus spread to Brunei on 9 March 2020, when its first case was confirmed in Tutong. Many early cases were linked to Jamek Mosque Sri Petaling in Kuala Lumpur, which held a large Tablighi Jamaat ijtema event at the end of February 2020. Of Brunei's first 50 cases, 45 were related to Jamek Mosque. The pandemic had spread to all districts of Brunei.