England won't take risks with Buttler before T20 World Cup
Buttler has not played in the series so far as he recovers from a calf injury he sustained while playing in The Hundred, with the team being led by Moeen Ali.
The World Cup takes place in Australia from October 16th-November 13th.
"With regard to Jos (Buttler), he's still a while off, he's not a player we want to take a risk on at this stage, so close to the World Cup, and it was a reasonably significant injury that he had," Mott told reporters.
"So, he's champing at the bit for a game, but we'll just try and see how we go and maybe in the last game or two we might give him a chance."
The series is level at 2-2 with the fifth game scheduled for Lahore on Wednesday.