Idil Biret's chamber music performances are relatively rare. Most importantly, she played Beethoven's violin Sonatas Nos. 5, 7 and 9 with Yehudi Menuhin at the Istanbul Festival in July 1973. In 1975, she played all the five Beethoven cello sonatas with Maurice Gendron. With the London String Quartet, in 1980, Biret played the Schumann and Brahms Piano Quintets at the Queen Elisabeth Hall in London, later at the Istanbul Festival and then recorded the Brahms Quintet as well as the Mahler Piano Quartet with the LSQ. In 2011, she played in concerts and recorded Berlioz's Harold in Italy in Liszt's piano transcription and Brahms' 2nd Viola Sonata with Rusen Gunes. In 2014, she played in concerts and recorded the Schumann Piano Quintet with the Borusan Quartet of Turkey. The same year, she recorded the two cello sonatas of Brahms with Roderic von Bennigsen. Finally, in 2019, Biret played and recorded Mendelssohn's 1st Piano Trio and the Tchaikovsky Piano Trio with Irina Nikotina and Julya Krepak. These are some of the memorable chamber music performances of her career.