PHOENIX — In the long run for the Knicks, Tuesday’s 113-111 overtime loss to the woeful Suns could be secondary to the loss of Derrick Rose 10 minutes into the first quarter.

Rose’s back spasms flared up after he appeared to take a tumble into a row of cameras. He missed the final three quarters and is a potential no-go for Thursday’s game in Oakland against the mighty Warriors. He was 0-for-6 at the time — out of sync compared to his 25-point domination of the Lakers.

Rose, who missed two straight games before his bang-up return Sunday in Los Angeles, retired to the locker room late in the first period, came back and was set to check in during the second period until he realized it wasn’t prudent.

“My back got tight and I couldn’t move,’’ Rose said. “I couldn’t tell you when — I just remember my back getting tight. I couldn’t move after it. [It] probably was that play.”

Backup Brandon Jennings struggled with the extra pressure and was 1-of-6 with two turnovers and five assists. Coach Jeff Hornacek even used undrafted rookie Ron Baker for 14:44, including a key stretch in the fourth when the Knicks made a comeback.

But they need Rose. Desperately.

“Yeah, if anything I just don’t want to get out of my rhythm,’’ Rose said of being surprised by the flare-up. “I feel I’m in a great rhythm right now. I can’t explain it. All I can do is get treatment and go from there.

“If I got in the game, I probably wouldn’t be able to move around.’’

There was an increased presence of pro scouts were on hand, coinciding with the Dec. 15 trade marker. Thursday marks the first time teams can trade the free agents they signed in July and their 2016 draft picks.

The Knicks will have eight new players eligible to be traded: Free agents Joakim Noah, Courtney Lee, Lance Thomas, Mindaugas Kuzminskas, Willy Hernangomez, Sasha Vujacic, Jennings, Baker, Mo Ndour and Marshall Plumlee.