Kelemen placed a career-best 14th at the 2012 European Championships. In August 2012, he decided to train in Switzerland with Gheorghe Chiper; he also works in Switzerland as he receives little support from the Romanian skating association. Kelemen earned another Olympic berth for Romania at the 2013 Nebelhorn Trophy. At the 2014 Winter Olympics, he qualified for the free skate and finished 23rd.