 Mentel was able to obtain the required funds to compete at the 2018 Winter Paralympics through crowdfunding.At the 2018 Winter Paralympics in PyeongChang, Mentel was once again the Dutch flag bearer, again winning the gold medal in the snowboard cross, as well as taking the gold medal on the banked slalom event, beating American competitor Brittani Coury by 0.07 seconds.Since being diagnosed with cancer at age 27, Mentel has been confronted with, and treated against cancer nine times, including five surgeries.