The minor is aged 14 years and nine months.
It is suspected that the minor, who resided in a village belonging to the Poojapitiya police area, was sexually abused as a result of a relationship that had taken place with a person who had visited that area.
It was reported that the minor had got pregnant as a result of the abuse and this was hidden from the people close to her.
However, the minor had given birth to a baby at her residence and due to the lack of medical supervision, she had been admitted to the Kandy General Hospital with severe bleeding.
A 29-year-old married man from Galagedara has been arrested on suspicion of sexually abusing the minor after the hospital informed the Poojapitiya Police.
The police have also taken steps to conduct a DNA test of the infant, while the suspect will be produced before the Galagedara Magistrate's Court.
Poojapitiya Police are conducting further investigations.