When the King briefly stepped down in 1724, often attributed to a fit of madness or a desire to be considered a claimant to the French throne, Grimaldo left office with him. When the King returned after only a year Grimaldo came with him, but was now increasingly in bad health and he was forced to retire from government. In 1733 he was made a Marquess, and died the same year at the age of seventy three.