CHICAGO — The Mets won’t be counting on Dominic Smith to contribute for at least another month.

Smith, according to general manager Brodie Van Wagenen, will remain in a walking boot for another three weeks — removed from baseball activities — after incurring a stress reaction in his left foot last weekend.

After the walking boot is removed Smith will have to build up into baseball shape, meaning in a best-case scenario he would be available in early September.

“It’s going to be a little bit longer than we expected,” manager Mickey Callaway said before the Mets beat the White Sox, 4-2, on Wednesday. “He’s a good left-handed bat for our lineup to win games and we’re going to miss him while he’s out.”

J.D. Davis has emerged as the everyday left fielder in Smith’s absence.

The Mets’ 2020 schedule is expected to include a trip to the Caribbean.

According to industry sources, the Mets likely will play a series in Puerto Rico against the Marlins next season. MLB is expected to soon announce the particulars of the arrangement, including the dates and whose home series it will be.

The Mets last played in Puerto Rico in 2010, against the Marlins. Hiram Bithorn Stadium in San Juan played host to a two-game series between the Indians and Twins in 2018.

A day after Edwin Diaz blew his fifth save in 28 chances this season, Callaway said he’s sticking with the struggling right-hander in the closer’s role. Diaz cited a mechanical adjustment he’s been working on with pitching coach Phil Regan as a reason for optimism.

“We have got guys that can fill many roles, but right now Diaz is our closer,” Callaway said. “We have been winning games lately and hopefully we’ll continue to do so. We’re going to do everything we can to put him in a better spot and continue to go out there and be our closer.”

Diaz allowed a home run but picked up the save in Wednesday’s victory.