The Violin Concerto No. 3 in G major, K. 216, was composed by Wolfgang Amadeus Mozart in Salzburg in 1775 when he was 19 years old. In a letter to his father, Mozart called it the "Straßburg-Concert". Researchers believe this epithet comes from the motive in the third movement's Allegretto in the central section, a local dance that already had appeared as a musette-imitating tune in a symphony by Carl Ditters von Dittersdorf.

The Köchel catalogue is a chronological catalogue of compositions by Wolfgang Amadeus Mozart, originally created by Ludwig Ritter von Köchel, in which the entries are abbreviated K. or KV. Its numbers reflect the ongoing task of compiling the chronology of Mozart's works, and provide a shorthand reference to the compositions.