Košarkaški klub Kolubara Lazarevac 2003 (Serbian Cyrillic: Кошаркашки клуб Колубара Лазаревац 2003), commonly referred to as KK Kolubara LA 2003, is a men's professional basketball club based in Lazarevac, Serbia. The club was named after Kolubara River. They are currently competing in the Basketball League of Serbia.