The body of the man, believed to be in his 60s, was discovered outside a house.
His remains were taken to Letterkenny General Hospital for an examination.
It is understood the death is believed to be suspicious.
Donegal Daily understands that the body was not fully-clothed.
The state pathologist’s office was contacted and assistant pathologist Dr Khalid Jabber on her way to Co Donegal.
No further Garda comment is being made on the matter at present.
A full post mortem is expected to be carried out later this afternoon.