Their breakup comes as Kanye continues to work around the clock to deliver his long-delayed Donda album.
It appears his hectic work life is the reason for their split — something Kim can relate to.
"It was never a serious thing that took off," a source told PEOPLE. "Kanye has been busy working and spending time with his kids. This is his focus. He doesn't have time to date right now."
Kanye had been holed up in Atlanta's Mercedes-Benz stadium for several weeks, which is where he promised to stay until Donda was complete.
On Monday, he was spotted shopping in Los Angeles, despite his album still not dropping. While Kanye was near his estranged wife's Calabasas, CA home, Kim and their children were on a tropic vacation with her ex-best friend Stephanie Shepherd.
Days later, Kim and Kanye were photographed sneaking into lunch together at celebrity hotspot Nobu in Malibu, CA.
The exes attempted to slide under the radar but were spotted by nearby photographers, who quickly caught the money shot.
Two days after their sneaky lunch date, it's now being reported that Kanye and Irina are over — despite the supermodel fiercely defending their relationship only one month ago.
While Kanye "finds Irina amazing though," the insider says their romance never fully blossomed; however, "they remain friendly."
The Jesus Is King rapper and Irina were first linked in early June, when they jetted off to France together to celebrate Kanye's birthday.
This is the first person Kanye has dated since Kim filed for divorce in February after nearly 7-years of marriage.
As Radar reported, the 22-time Grammy winner was "disappointed" his relationship with Irina didn't break the Internet like Jennifer Lopez's reunion with Ben Affleck.
“Kanye literally through the news of him dating again would-be front-page news. He envisioned news channel breaking into their coverage to announce that Kanye was in a new relationship. He expected Vogue and other fashion magazines to be calling begging him to do a cover and is very disappointed that this hasn’t happened," a source told us at the time.
But the couple was still going strong last month. "They are very much still dating," an insider told PEOPLE, adding Irina joined Kanye in San Francisco in July.