In an article for Evelyn Waugh Studies (the newsletter for the Evelyn Waugh Society), Martin Stead suggests that Saki was one influence on Evelyn Waugh’s novel A Handful of Dust:
One other likely influence is the novel The Unbearable Bassington (1912) by Saki (H. H. Munro). The bulk of this work takes place in London, and, like Waugh’s novel, shows up the shallowness of the characters in the fashionable world. Then, at the end, the action shifts abruptly to the jungle, to where the hero, Comus Bassington, has been exiled, and where he dies, hopelessly mourning his former life. Waugh admired Saki, and wrote the 1947 introduction for a reprint of Bassington, although he felt the novel to be less successful than the short stories. Waugh and Saki certainly share a number of points, such as a clipped, pared-down style, some extremely dark humour, and the habit of telling much of their stories in dialogue.
If you haven’t read A Handful of Dust, you should! (I am assuming my readers have read The Unbearable Bassington.)
Source: Evelyn Waugh Studies Vol. 54, No. 2