Recently engaged McIlroy said a few weeks ago that he and fiancee Erica Stoll planned to have a family and he was worried about the mosquito-borne virus which has been linked to brain defects in babies.
In a statement issued today, McIlroy said that “my health and my family’s health comes before everything else”.
“Even though the risk of infection from the zika virus is considered low, it is a risk nonetheless and a risk I am unwilling to take.”.
The 27-year-old Northern Irishman follows Vijay Singh and Australia’s Marc Leishman who have already pulled out of the games because of the zika issue.
McIlroy, who was due to represent Ireland, added:”I trust the Irish people will understand my decision.
“The unwavering support I receive every time I compete in a golf tournament at home or abroad means the world to me.
“I will continue to endeavour to make my fans and fans of golf proud with my play on the course and my actions off it.”