McShane had a scan on a calf injury earlier in the week, but has been forced to admit defeat and has followed Stoke striker Jon Walters in heading home.
A spokesman for the Football Association of Ireland said:
"Paul McShane has withdrawn from the squad to face Greece in Aviva Stadium tomorrow night due to a calf injury. He will return to his club later today for treatment. No replacement has been called up."
Source: PA
Source: PA