Leopards have been named an endangered species, and less than 60 of them live at Yala.
The dead animal is a female aged around three years.
Its death was due to fatal injuries to the spinal cord.
A wildlife officer said animals are run over by speeding Safari jeeps and private vehicles, although there is a speed limit of 25 kmph inside the wildlife park.
Another obstacle is a shortage of guides, who presently number 32, although the requirement is 60.
