The palace, as reported by The Independent, said she was "grateful to everyone who has followed her social media accounts over the years" but had closed them "as she has not used these accounts for some time".
The 36-year-old's various accounts had been inactive for quite some time.
In April last year, she shut down her lifestyle website 'The Tig'.
Social media for the royal family is typically handled by the official accounts of Kensington Palace and Clarence House, rather than individual members having their own pages.
The royal wedding of Prince Harry and the American actress will take place on May 19. (ANI)