At least 43 minutes of play must be completed for NBA game bets to stand. If a game is suspended before that point, all bets are void, except for any markets that have already been unconditionally decided. If an official result is declared, all bets stand.
For games with a 40-minute regulation length (such as NBL, NCAA and WNBA), the minimum is 35 minutes.
For more information, see the General Rules, Tickets & Wagers article.