Mayor Bill de Blasio finally admitted Wednesday that it would be “really tough” to stay in the 2020 race if he doesn’t make the October Democratic primary debates.

“I think the logical thing to say is, I’m going to try to get into the October debates. If I can, I think that’s a good reason to keep going forward, and if I can’t, I think it’s really tough to conceive of continuing,” said de Blasio at an unrelated Manhattan press conference.

“That deadline is Oct. 1,” he added.

The term-limited pol did not make the cutoff for the Sept. 12 debate in Houston as he failed to get at least 2 percent in four polls or 130,000 donors.

“I don’t think the debates are the end-all-be-all,” de Blasio said. “But they are kind of the main street of dialogue.”

Still, the mayor is not giving up on his White House dreams just yet.

“We’re one of the most unpredictable environments we’ve ever been in. Anything is possible,” he said.