Zimbabwe and Ireland are two of the most unpredictable ODI teams going around in the world at the moment.
Balbirnie, who scored a hundred in the first ODI, had to retire hurt after being struck on the helmet.
Zimbabwe clinched the T20I series 2-1.
It is the battle that will test the best as we are down to the decider of the series with Zimbabwe and Ireland going head to head at Harare Sports
Ireland fights back to stay alive in the three-match T20I series in Zimbabwe.
Despite missing key players including Sikandar Raza, Zimbabwe won the opening T20I by 5 wickets
Sean Williams held his nerves with the bat after a dominating bowling performance as Zimbabwe won the first T20I against Ireland by 5 wickets and took 1-0 lead in three-match
On Thursday, Ireland will lock horns with hosts Zimbabwe in the first T20I of the three-match series.
All-rounder Sikander Raza has been given the clearance to play in Bangladesh Premier League
Zimbabwe will play three T20Is against Ireland between January 12 and 15.