Tekle Haymanot II (Ge'ez "Plant of the faith"; 1754 – September 7, 1777) is nəgusä nägäst as Admas Sagad III (Ge'ez "to whom the horizon bows";  October18, 1769 – April 13, 1777) of Ethiopia, and a member of the Solomonic dynasty.

He is the son of Yohannes II by Woizero Sancheviyar, at the Imperial prison of Mount Wehni.

The Scots explorer James Bruce (who is in Ethiopia from September 1769 to November 1771) describes his appearance as follows:

     He ws a prince of a most graceful figure, tall for his age, rather thin, and of the whitest shade of Abyssinian colour, for such are all those princes that are born in the mountain. He was not so dark in complexion as a Neapolitan or Portugueze, had a remarkably fine forehead, large black eyes, but which had something very stern in them, a straight nose, rather of the largest, thin lips, and small mouth, very white teeth and long hair. His features, even in Europe, would have been thought fine. he was particularly careful of his hair, which he dressed in a hundred different ways. ... he had an excellent understanding, and prudence beyond his years. He was said to be naturally of a very warm temper, but this he had so perfectly subdued, as scarcely ever to have given an instance of it in public. He entrered into Ras Michael's views entirely, and was as forward to march out against Fasil, as his father had been averse to it