Uchaüan Küin Büalam (died on May 28, 741) was the fourth Mayan king of Dos Pilas. He is also known as the Ruler 3, Master of Sun Jaguar, Scroll-head God K, Spangle-head and Jewelled-head. His title was "He of Five Captives".
He reigned from 727 to 741.
His parents are not known. He was a successor of the king Itzamnaaj Küawiil.
The fact that Uchaüan Küin Büalam followed Itzamnaaj Küawiil on the throne even though the latter probably had a son, can be explained in this way: the royal prince was too young to assume the rulership on his own, so there was a need for his regent.
One depiction shows us Uchaüan Küin Büalam presiding over a ritual featuring a young boy, presumably the prince and his successor Küawiil Chan Küinich.
Uchaüan Küin Büalam is famous for capturing Yichüaak Büalam, king of Seibal.
He erected victory monuments at both Dos Pilas and Aguateca.
He died on May 28, 741.
Uchaüan Küin Büalam married GI-Küawiil, Lady of Cancuén. It seems that they had no children.