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Scott Disick has canceled an appearance in Atlantic City this weekend.

Kourtney Kardashian's ex "pulled the plug" on hosting Harrah's Pool After Dark Saturday, according to the event's Instagram page. E! News has learned the cancellation is due to a "last minute change in [Scott's] schedule."

This is the second promotional appearance the father of three has pulled out of since Kourtney broke things off with him over the Fourth of July weekend. Scott was scheduled to appear alongside DJ Shift at 1OAK in Las Vegas on July 10, but just one day before the event, he cancelled. The club stated that Scott's appearance had been postponed until TBD, noting that the evening would resume as planned with DJ Shift.

Sources tell E! News Scott has been "telling friends he's doing good" in the wake of his and Kourtney's breakup, but he's "basically stopped communicating with everyone" which has prompted those close to him to worry that he's "gone off the deep end."

On July 5, Scott checked into a treatment facility after returning to the United States from Monte Carlo, where he was photographed partying and getting a little too cozy with an ex-girlfriend. E! News learned, however, the the father of three left the treatment facility after just a few hours. The very next day, sources told E! News Scott was in Miami and had back to partying.

Scott cut another rehab stay short last year, after an evening of partying left him fearing he was going to die. As shown on Kourtney & Khloé Take the Hamptons, this wild night made Scott "realize how much was at stake," prompting him to briefly seek treatment at a facility in Connecticut.

In March 2015, Scott sought treatment again, this time checking in to a rehab facility in Costa Rica. Although he returned to California within a few weeks, a source told E! News at the time he was expected "to return [to rehab] some time soon as part of his ongoing therapy."

Although Kourtney has been supportive of Scott through his ups and downs in the past, his most recent month-long party binge proved to be too much. When the couple broke up earlier this month, a source told E! News that "Kourtney has always taken Scott back and been by his side, but now with three kids it has gotten old. Kourtney has to do what's best for the kids."

—Reporting by Baker Machado & Beth Sobol