Sergei Aleksandrovich Zadelenov (Russian: Серге́й Александрович Заделенов) (born 27 February 1976 in Navapolatsk, Byelorussian SSR, Soviet Union) is a Belarusian professional ice hockey centre.

He currently plays for HC Dynamo Minsk of the Kontinental Hockey League.

Zadelenov was selected for the Belarus national men's ice hockey team in the 2010 Winter Olympics.

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