The Boston Celtics defeated the Dallas Mavericks, 106-99, in Game 3 of the NBA Finals to take a 3-0 series lead. The Mavericks mounted a fourth quarter comeback as they trailed by 21 points (91-70) at the 10:21 mark of the fourth quarter to make it a 93-92 game with 3:37 to go. Boston held off despite being outscored 29-21 in the final quarter.