On July 7, 2003, Lyashenko committed suicide while on vacation in Antalya, Turkey with his mother and sister. Turkish police said that Lyashenko left a suicide note and tried to cut his wrists and arms before he hung himself. Glen Sather, general manager of the New York Rangers said "Roman was a quality individual who had a positive impact on everyone he touched, both on and off the ice." Dallas Stars general manager Doug Armstrong also said: "Roman was a quality young man who we were privileged to have in our organization for three years." Lyashenko was buried in Yaroslavl on July 12, 2003.