Ryne Stanek’s miserable stretch continued Wednesday night in the Mets’ 4-3 loss to the Diamondbacks.

After the Mets pieced together their pitching to carry a lead into the seventh inning — including call-up Brandon Waddell contributing 4  1⁄3 scoreless innings — Stanek blew the late lead for a third time in three appearances across six days.

Geraldo Perdomo’s pinch-hit, two-out, two-run single off Stanek in the seventh accounted for Arizona’s first runs of the game.

“It doesn’t feel good,” Stanek said. “But I can’t look at one pitch that I didn’t execute over the last three games, and the results have been bad.

“I gave up three hits today and the hardest one might’ve been 80 [mph]. All I can do is beat the hitter. They couldn’t have thrown the ball in a better spot. Such is life. It sucks. It doesn’t feel good.”

Recent failures have caused Stanek’s ERA to balloon to 5.06. Combined with A.J. Minter’s left lat tear that might require season-ending surgery and closer Edwin Diaz’s general iffiness, the Mets suddenly face uncertainty in their late-and-close bullpen situation.

Like Stanek, manager Carlos Mendoza blamed fluky bad luck.

“Honestly, the ball is not bouncing his way,” Mendoza said. “It’s tough luck right now. The stuff is good. He just has to continue to fight through it.”

Stanek said: “Nobody is going to feel bad for me. So the job is to go execute and hopefully the next time they hit the balls at people instead.”

The Mets (21-10) had chances to come back but fell short. Most significantly, in the bottom of the ninth, they loaded the bases with no outs, putting the potential tying run at second and winning run at first. But they scratched across just one additional run. Francisco Alvarez grounded out against Ryan Thompson to end it.

The Mets finished 0-for-10 with runners in scoring position and left 13 men on base.

“They got the big hit, especially with two outs,” Mendoza said. “We created some chances and we couldn’t come through. You can make a case for that [being the difference in the game].”

For most of the night, the Mets threatened to steal a game that featured a pitching matchup that, on paper, put them at a disadvantage.

Arizona went with its best, righthanded ace Corbin Burnes, who held the Mets to one run in six innings. After spending years establishing himself as one of the top pitchers in the sport, including winning the 2021 NL Cy Young Award for David Stearns’ Brewers, he cashed in over the offseason, joining Arizona on a six-year, $210 million contract.

The Mets, meanwhile, opted to use an opener (middle reliever Huascar Brazoban) for two innings, then turned to the would-be starting pitcher, Waddell, who owns a career 4.94 ERA in Triple-A and appeared in his first major-league game since 2021.

Waddell retired 13 of 16 batters, mixing in three lonely singles across 4  1⁄3 innings. The Citi Field crowd of an announced 31,904 gave him a standing ovation as he left the game — and as Stanek entered — after he struck out Josh Naylor in the top of the seventh.

In that moment, Waddell, 30, was in line for his first major-league win.

“It’s something I definitely didn’t expect,” Waddell said of the fans’ reaction. “But you could feel it. As a player, it means a lot to have that support.”

Waddell spent the past three seasons pitching in Korea and Taiwan before returning to the United States on a minor-league contract with the Mets.

“It was awesome. It’s good to be back,” he said. “Like I said in spring training, I think I can pitch here. That was one of the reasons I really wanted to come back [stateside]. To be able to do that is pretty cool.”

Danny Young might need Tommy John surgery, Mendoza said, after he landed on the injured list Wednesday with a left elbow sprain. That left the Mets with zero lefthanders in the bullpen. They called up Chris Devenski to take his roster spot . . . Reliever Kevin Herget was returned to Syracuse after his two-inning cameo Tuesday . . . Paul Blackburn (right knee inflammation) is due to resume his rehab assignment with High-A Brooklyn on Friday . . . Brandon Nimmo, who was feeling much better, was out of the starting lineup for a second game in a row because of the flu and entered as a pinch hitter in the eighth.