Three Problems for Solar Pons is a collection of detective fiction short stories by author August Derleth. It was released in 1952 by Mycroft & Moran in an edition of 996 copies. It was the third collection of Derleth's Solar Pons stories which are pastiches of the Sherlock Holmes tales of Arthur Conan Doyle. The book was intended as an interim collection and all the stories are reprinted in The Return of Solar Pons. Because of the low print run, it is the scarcest Mycroft & Moran book.