Marchenko was selected to compete for the Ukrainian squad at the 2016 Summer Olympics in Rio de Janeiro, shooting in both individual and team recurve tournaments. Two months before her maiden Games, she commanded the Ukrainian trio in thrashing the Estonian side for one of three women's team spaces at the World Archery Cup meet in Antalya, Turkey. Marchenko opened the tournament by discharging a total of 630 points, 15 perfect tens, and 6 bull's eyes to seal the thirtieth seed heading to the knockout draw from the classification round, along with the trio's cumulative score of 1,890. Sitting at eighth in the women's team recurve, Marchenko, along with Pavlova and Sichenikova, slipped out of their initial round match to a convincing 2–6 defeat from the ninth-seeded Japanese women. In the women's individual recurve, Marchenko successfully overcame Estonia's Laura Nurmsalu for a comfortable 6–0 victory in the opening round, before she faced a 2–6 conquest in her subsequent match from the defending champion Ki Bo-bae of South Korea.