The Red Devils are facing being without the services of nine players for their next game, with Luke Shaw, Tyrell Malacia, Victor Lindelof, Lisandro Martinez and Anthony Martial definitely out.
Meanwhile, Scott McTominay, Raphael Varane, Jonny Evans and Marcus Rashford could also be unavailable for selection at the Vitality Stadium.
Rashford was not visible in the training-ground pictures released by Man United on Wednesday, and the same can also be said for Amrabat, with the Morocco international not appearing to be involved in the session.
The 27-year-old had been expected to be a regular starter for the Red Devils this season following his arrival on loan from Fiorentina in the latter stages of last summer's transfer window.
Amrabat has made 23 appearances in all competitions for Erik ten Hag's side, with 15 of those coming in the Premier League, but he has been unable to break into the side on a regular basis.
The Morocco international has only started seven league games this term, while he has featured just once in the FA Cup, playing the full 90 minutes against Nottingham Forest at the end of February.
Amrabat was a late substitute in Man United's 2-2 draw with Liverpool in the Premier League last weekend, but there was no mention of any potential fitness issue after the match.
Ten Hag will speak to the media on Friday afternoon ahead of the clash at Bournemouth, and he will be asked about the club's injury situation, with 10 players now seemingly in danger of missing Saturday's contest.
Amrabat unlikely to join Man United on a Read on sportsmole.co.uk