The String Quartet, Op. 3, by Alban Berg was composed in 1910.
In two movements (Langsam and Mäßige viertel), the work is more freely atonal than the sonata. It is highly contrapuntal in texture. The first movement is in sonata form, with a main theme based on the whole-tone scale. The second movement uses a modified version of the same theme in a rondo form.
Along with the composer's Piano Sonata, it received its premiere on 24 April 1911 at the Vienna Musikverein, although it was not published until 1920.