Just the partnership with Nasir Hossain having managed to reach 50, Naeem Islam made his way to the pavilion giving an easy catch to Prashad in the mid-off on the 40th over being bowled by Senanayeke.
After the 47.2 over, Bangladesh scored a modest 228 for the loss of seven wickets.
Earlier, Bangladeshi middle order looked steady after the early losing of one opener.
The young sensation of the host Mominul Haque made another half century and ran out at 60 using just equal number of balls.
Bangladesh is playing third of the one day series against the tourists, Sri lanka.
Sri Lanka won the two matches played before.