The figure is down from 32 cases in March.
The man was charged in February but a court hearing has not been held so far.
Child sexual abuse is a problem in the Maldives. More than 400 cases of child sexual abuse were reported last year alone.
Family members of the alleged victim claim the girl was subjected to abuse for more than a year and that the mother was aware of it.
A 45-year-old man was arrested on a southern island Monday night on suspicion of sexually abusing a six-year-old girl who previously victimised by a different perpetrator.
A Bangladeshi worker was arrested on Saturday night on suspicion of sexually abusing a 17-year-old girl on the island of Nilandhoo in Faafu atoll.
Local NGO Advocating the Rights of Children (ARC) has meanwhile expressed concern with the "hidden epidemic of child abuse that continues unabated in the country". A...