https://deadline.com/2025/10/chicago-pd-patrick-flueger-leave-of-absence-adam-ruzek-1236593672/

According to sources (https://www.google.com/search?q=Chicago+P.D.+star+Patrick+John+Flueger+takes+a+sudden+leave+of+absence+to+deal+with+a+personal+matter&oq=Chicago+P.D.+star+Patrick+John+Flueger+takes+a+sudden+leave+of+absence+to+deal+with+a+personal+matter&gs_lcrp=EgZjaHJvbWUyBggAEEUYOdIBCjEyODg5ajBqMTWoAgywAgHxBZV52EhucuCB&sourceid=chrome&ie=UTF-8), the time off comes as Flueger has been going through a difficult period personally, with an instance of alcohol use on set ...

Chicago P.D. Season 13: Adam Ruzek's Absence, Explained (https://www.looper.com/2071420/chicago-pd-season-13-adam-ruzek-absence-explained/)

With star Patrick John Flueger taking a leave of absence from "Chicago P.D.," his character Adam Ruzek's absence had to explained on the show as well.