Competing in the 2015–16 JGP series, Samarin finished fourth in Slovakia and won gold in Croatia. He appeared at two CS events, placing fourth at the 2015 Mordovian Ornament and winning the 2015 Warsaw Cup. At Russian nationals, he ranked eighth on the senior level and won the silver medal as a junior, behind Dmitri Aliev. He finished fourth at the 2016 World Junior Championships in Debrecen, after winning a small silver medal for the short program and placing fifth in the free skate.