Horror
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Mystery of Slender Man 3 (also know as Secret of Slenderman 3) full movie is released on Aug 16, 2016. Watch Mystery of Slender Man 3 online - the Russian Horror movie from Russia. Mystery of Slender Man 3 is directed by Sergey A. and created by Sergey A. with Sergey A. and Dmitriy Khmelyov.