Albion manager Mark McGhee has warned Paul McShane he must learn to calm down to stop landing in trouble with referees.
McShane collected his tenth caution of the season in last Saturday's 1-0 home defeat by Watford.
The on-loan Manchester United centre half is now suspended for Saturday's basement battle at Crewe and the trip to Plymouth seven days later.
McShane was booked in the 14th minute for a foul on French youngster Hameur Bouazza.
McGhee said: "Paul is still a Manchester United player and yet he has showed commitment to our cause way above the call of duty.
"He is robust and over-zealous at times. A lot of the ten bookings he's had have been for tackles like the one he got booked for against Watford, which was deserved.
"He is still a young lad and, as he matures as a player, he has got to get that out of his game."
Bookings by the same ref, Suffolk's Mike Thorpe, at Norwich last week and against Millwall at Withdean on New Year's Eve left McShane on the brink of his second ban of the season.
He went over the limit when Kent official Phil Crossley penalised him for a reckless challenge on Bouazza.
McShane said: "I'm devastated. I tackled Ashley Young and I was there for a second one.
"I thought I would go in and shake him (Bouazza) up a little bit and get the ball.
"That's what I always intend to do. Unfortunately, he got there and I hit him hard. It was early in the game and I thought maybe I would get away with it.
"It's annoying and frustrating. I'm missing games now and I don't want to. I want to play in every game and it's stupid.
"Maybe I should learn from that. Hopefully I'll take it on board and get back into the team when my time comes round again.
"I can't feel sorry for myself. Next time hopefully I'll be more careful."
McShane will not be available until Preston's visit on March 11. His place against Crewe is likely to be taken by either Adam Hinshelwood or Adam El-Abd.
Gary Hart faces a suspension if he is cautioned on Saturday. Hart has been a booking away from a one-match ban since January 14.
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