Marek Viedensky (born August 18, 1990 in Handlova, Slovakia) is a Slovak centre playing for the Saskatoon Blades of the Western Hockey League.

He played Tier II Junior "A" for the Prince George Cougars in 2008-09 and part of the 2009-10 seasons. He then was promoted to the major junior Blades.

Viedensky was chosen 189th overall by the San Jose Sharks in the 2009 NHL Entry Draft and 80th overall by Neftekhimik Nizhnekamsk in the 2010 KHL Junior Draft.

He played for Slovakia in the 2008 IIHF World U18 Championships and the 2010 World Junior Championship.

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