The 1999 Southeast Asian Games Competition ( ) , officially known as the 20th Southeast Asian Games Competition , was a Southeast Asian multi-sport event held Hold in Bandar Seri Begawan , Brunei Darussalam .

The hosting Social_event rights were originally awarded Giving to Brunei Darussalam , but the country pulled out GiveUp days before the 2015 Southeast Asian Games Competition due Causation to `` financial and logistical reasons Causation . ''