The postseason completely turned for Raymond Felton last night — and not for the better.

Throughout the Knicks’ eight-game playoff run entering last night, Felton had been magnificent. He had been the Knicks’ most consistent postseason player — and arguably their best.

Until last night.

In the Knicks’ 82-71 Game 3 debacle at Bankers Life Fieldhouse, Felton was a disaster.

He didn’t score a single point for the first three quarters, finishing with just six points on 1-of-8 shooting, with two assists and three turnovers as the Knicks had their second lowest scoring output of the season.

“One of those nights where you hate it, it makes you angry, it makes you frustrated,” Felton said of the Knick offense.

None of the Knicks point guards was able to get the team into an offensive flow or generate any individual production — Pablo Prigioni and Jason Kidd were a combined 0-for-4. Kidd has now gone scoreless in his last seven games, shooting a combined 0-for-14.

Still, it is Felton who’s the most instrumental floor general. And last night he couldn’t deliver.

Late in the third quarter of Game 2, Felton sprained his left ankle and didn’t return. On Friday he dismissed it as even a remote concern, saying he was completely healthy, and he didn’t look hobbled. He just looked inconsequential.

“I don’t make any excuses about anything. I was fine,” he said. “I just couldn’t put the ball in the ocean.”