The Scots had won the toss and were set to bowl but never got the chance to start as rain continued to fall at Bready Cricket Club.
Scotland lead the series 1-0 after Matthew Cross hit 60 off 33 balls as the visitors beat Ireland by six wickets in their first T20 match on Thursday.
The warm-up fixtures at Bready were aiming to help both sides prepare for July???s World T20 qualifiers.
The final game of the series will take place on Sunday at 2pm.??