The Cambodians lost 3-0 to the tourists with both sides ending the game with 10 players.
Nothing separated the teams at half-time after a goalless first session, but the game was turned on its head within seconds of the restart as Crown’s Sraing Titchhy was given his marching orders for a second yellow.
East Timor’s Ricardo Mendonca then seized the advantage with a strike moments later. Pelagio da Costa doubled their lead on 55 minutes before the home team were thrown a lifeline as East Timor keeper Nuno Belo was sent off for handling the ball outside the area.
However, they failed to capitalise and Mendonca confirmed the rout with his second on 80 minutes as Crown were condemned to their fourth straight defeat.