Helmhold III, Count of Schwerin (died 1295) was a German nobleman.
He was a son of Count Gunzelin III of Schwerin-Boizenburg and Margaret of Mecklenburg.
Helmhold III was the ruling Count of Schwerin-Neustadt and Marnitz from 1274 until his death.
His first wife was Mathilda (some sources call her Margaret; d. 1265), a daughter of Albert I, Duke of Saxony.
Together, they had three children: After Mathilda's death, Helmold married Margaret, the daughter of Eric I, Duke of Schleswig.