The inclusion of Pierre comes as the Caribbean side looks to strengthen its spin department ahead of a crucial subcontinental assignment.
The West Indies camp faced a double setback with injuries to Shamar Joseph and Jediah Blades, both of whom have been ruled out of the series.
In their absence, the squad will now consist of 14 players instead of the originally announced 15.
The first T20I is scheduled for October 27 at the Zahur Ahmed Chowdhury Stadium, followed by the second and third matches on October 29 and October 31, respectively.
