Boston Celtics' Marcus Smart (36) reacts after hitting a three point basket against the Cleveland Cavaliers during the second half of Game 3 of the NBA basketball Eastern Conference finals, Sunday, May 21, 2017, in Cleveland. (AP Photo/Tony Dejak)
Boston Celtics' Marcus Smart (36) reacts after hitting a three point basket against the Cleveland Cavaliers during the second half of Game 3 of the NBA basketball Eastern Conference finals, Sunday, May 21, 2017, in Cleveland. (AP Photo/Tony Dejak) Credit: Tony Dejak

CLEVELAND — Avery Bradley’s 3-pointer dropped in with less than a second left and the Boston Celtics, blown out in the first two games of the Eastern Conference finals and playing without star Isaiah Thomas, stunned the Cleveland Cavaliers 111-108 on Sunday night in Game 3 to end the champions’ 13-game postseason winning streak.

Bradley’s shot from the left wing bounced on the rim four times before going down. It capped a furious comeback by the Celtics, who trailed by 21 in the third quarter before rallying to tighten up a series that appeared to be over.

Marcus Smart scored 27 points, and Bradley had 20 for the Celtics. They were given little chance after losing by 44 in Game 2 and then losing Thomas for the rest of the postseason because of a hip injury.

Kyrie Irving scored 29 points, and Kevin Love 28 for Cleveland. The Cavaliers dropped to 10-1 in the postseason with their first loss since Game 4 of last year’s Finals.