The final match will be played on July 14 at Bready Cricket Club, Magheramason, Bready.
The second T20I between Ireland Women and Zimbabwe Women will be played on July 12 at Bready Cricket Club.
The first T20I between Ireland Women and Zimbabwe Women will finally be played at Belfast, on July 10.
India and West Indies won the final warm-up matches, West Indies Women took a 2-0 lead against Ireland, and Steyn will miss the World Cup opener.