The third season of Iss Pyaar Ko Kya Naam Doon picks up where the second season left off. Abhishek and Sanjana are still in love, but their relationship is put to the test as they face new challenges and obstacles. The season introduces new characters, including Abhishek's cousin, Ansh, and his girlfriend, Pooja. These new characters add a fresh dynamic to the show, as they bring their own set of problems and conflicts.