Marshall is listed as questionable for Wednesday's game against the Timberwolves due to an illness.
The Mavericks will likely see how he's feeling closer to Wednesday's 7:30 p.m. ET tipoff before determining Marshall's status. With Klay Thompson (ankle) and Quentin Grimes (back) also uncertain to play against Minnesota, Dallas could be forced to rely upon Olivier-Maxence Prosper to cover heavy minutes at forward.