SEA Games, officially known as the South East Asian Games, is a biennial multi-sport event involving participants from the current 11 countries of Southeast Asia. The games are under the regulation of the Southeast Asian Games Federation with supervision by the International Olympic Committee (IOC) and the Olympic Council of Asia (OCA). The SEA Games is one of the five subregional Games of the Olympic Council of Asia (OCA).

The 1999 SEA Games, officially known as the 20th SEA Games and commonly known as Brunei Darussalam 1999, was a Southeast Asian multi-sport event held in Bandar Seri Begawan, Brunei. This was the first time Brunei hosted the Southeast Asian Games and also in Borneo island. These were the last to have ever staged during the 20th century, and this was the only occasion, to date, that Brunei had held the SEA Games.