Symphony No. 3 'Organ' is a symphony by French composer Camille Saint-Saëns, completed and premiered in 1886. Scored for orchestra with a prominent pipe organ and optional piano and cast in C minor with a cyclic structure that links movements through recurring themes, it exemplifies late-Romantic orchestral colouration and stands as Saint-Saëns's third and final symphony, reflecting his mature approach to large-scale form.