Lo sposo deluso, ossia La rivalità di tre donne per un solo amante (The Deluded Bridegroom, or The Rivalry of Three Women for One Lover) is a two-act opera buffa, K. 430, composed by Wolfgang Amadeus Mozart between 1783 and 1784.

[2] According to Neal Zaslaw, Cimarosa's librettist may have been Giuseppe Petrosellini, the house poet of the Teatro Valle where Le donne rivali premiered.

[3] For Lo sposo deluso, Mozart had the characters in Le donne rivali expanded from five to seven, renamed the original five, and established the cast of singers for whom he would be writing.

This used the existing pieces from Lo sposo deluso and L'oca del Cairo as well as arias written by Mozart for insertion into operas by Anfossi, Piccini and Cimarosa, among others.

In 2006, the 250th anniversary of Mozart's birth, the fragment of Lo sposo deluso received several performances, including: Note that the opera was unfinished and never premiered as such.