The couple were due to host an informal dinner and concert in Paris after visiting the palace, Omar Cherif told Reuters TV.
The two had hoped to marry at Versailles, which King Louis XIV transformed from a hunting lodge into the dazzling heart of an absolutist state but were told in January that would not be possible.
Kardashian and West will celebrate their wedding in the 16th century Belvedere Fort in Florence on Saturday.
An official at Florence mayor's office said last week that the couple were renting the Belvedere Fort for 300,000 euros ($411,100) for the occasion, which will be presided over by a Protestant pastor.
However, as the castle is not an authorised site for weddings, there was some question about whether the event will be an officially recognised marriage ceremony or a celebration with some looser status.