Its Over!!!

Kendall Jenner and Devin Booker are dunzo -- the model and NBA superstar reportedly split up recently ... and its all due to their hectic schedules.

KJ and D-Book first went public with their love on Valentines Day in 2021 ... but as TMZ Sports previously reported, they became an item after spending a ton of time quarantining together in 2020.

Aside from a brief breakup, they held strong for well over two years ... and packed on a ton of PDA at numerous events throughout their relationship.

People reports Jenner and Bookers romance fizzled out as they focused on their respective careers ... and ultimately, it wasnt the right time for them to try to make it work.

The outlet says the split was amicable and mutual ... and they will remain in touch.

The timing is understandable -- Booker is in the heart of his 8th NBA season, and Jenner is tied up with her modeling career and 818 tequila company.

Both Jenner and Booker are incredibly attractive and successful ... so were sure if theyre done for good, they will have no problem finding the right person.