A stress fracture in his foot that kept Katsalapov off the ice in early 2015 recurred in the summer of 2015, keeping the duo out of test skates organized by the FSFR. Competing in the 2015–16 Grand Prix series, Sinitsina/Katsalapov won the silver medal at the 2015 Skate America, obtaining the highest total technical elements score in the free dance, and then bronze at the 2015 Rostelecom Cup, behind Italians Anna Cappellini / Luca Lanotte. They were the second highest-ranked Russian couple in the Grand Prix rankings, behind Ekaterina Bobrova and Dmitri Soloviev who also won one silver and one bronze but had a higher total short dance score, and were the first alternates for the 2015–16 Grand Prix Final. In December, Sinitsina/Katsalapov won the silver medal behind Bobrova/Soloviev at the 2016 Russian Championships in Yekaterinburg.