Selected Letters III (1929-1931) is a collection of letters by H. P. Lovecraft.

It was released in 1971 by Arkham House in an edition of 2,513 copies.

It is the third of a five volume series of collections of Lovecraft's letters and includes a preface by August Derleth and Donald Wandrei.

Selected Letters III (1929-1931) includes letters to: