In an absolutely stunning defeat, the Cleveland Cavaliers, who had led for much of the second half, fell apart in the closing seconds of Game 3 of the N.B.A. finals and ended up losing to the Golden State Warriors, 118-113. Golden State, after an 11-0 run at the end of the game, now has a commanding 3-0 lead in the series.

In the final 3 minutes and 10 seconds of Game 3, the Cavaliers saw their chances of an upset in these finals essentially evaporate. The Warriors closed the game on a huge run that was all Stephen Curry and Kevin Durant, with Durant’s 26-foot 3-pointer with 45 seconds remaining putting the team on top to stay, 114-113.

The run seemed to come out of nowhere, with LeBron James and Kyrie Irving dominating for much of the second half, combining for 77 points in the game. The two-man dominance was simply not enough, even with a solid effort from J.R. Smith, thanks to the Warriors’ stacked lineup. Klay Thompson, Durant and Curry combined for 87 points, with Durant leading the way with 31 and Curry improbably tying Kevin Love as the game’s top rebounder with 13.

With the win, the Warriors have now extended their postseason record to 15 consecutive games, and in Friday’s Game 4 have a chance to be the first team to complete a postseason undefeated. Needless to say, no team has ever come back from a 3-0 deficit in the N.B.A. finals. But if there is a glimmer of hope for the stunned Cavaliers, no team had ever come back from a 3-1 deficit until last year when Cleveland did that against Golden State.