In 2018, he competed at his second Olympics, twelve years after his first, after crowdfunding the equivalent of over US$28,500 to enable him to do so. He finished in 23rd position in the pursuit, 38th in the sprint and 75th in the individual. In January 2019, at the Oberhof World Cup meeting, Rösch announced that he would retire from competition after the next weekend's following World Cup round in Ruhpolding, explaining that he felt it was the right time to retire as he was expecting to become a father for the first time, with his girlfriend being due to give birth in March.