A villager had spotted the body of Thinnakorn Chawat, 42, in the muddy pond in Si Ubon village.
Thinnakorn’s body was lying face-down in the mud and his sandals had been left on the bank of the pond.
There were no signs of foul play and police believe the man fainted because of the heat on Sunday afternoon and drowned after falling face-first into the mud.
Villagers told police they had seen Thinnakorn walking to the pond in the heat of the afternoon.