Due to the lack of availability of Ambulances for this game Tier 3 in the North Stand and Tier 2 in the West Stand will now be closed, reducing the capacity to 62,000.
The club confirmed West Stand tier two and North Stand tier three will be closed, leaving the tie with a 62,000 capacity.
As the match is a sellout, the club say they will contact those affected and offer refunds.
More on this from BBC:
Manchester United cut capacity for Burnley match because of ambulance strike – BBC Sport