Macdonald Hotels is on the hunt for a new fine-dining operator to run the restaurant at the Compleat Angler hotel in Marlow, after the London Fine Dining Group ended its partnership there.
The London Fine Dining Group had been running Aubergine at the Compleat Angler under chef Tim O'Shea, and holds three AA rosettes at the site.
In a statement on its website, it said: "After five successful years together, London Fine Dining Group and Macdonald Hotels are ending their partnership of Aubergine Restaurant at The Compleat Angler.
"With the original agreement reaching completion, London Fine Dining Group has decided to focus on its central London restaurants.
"London Fine Dining Group wishes Macdonald Hotels all the very best for the future."
Property firm Colliers International has been appointed to help find a new operator.
A new lease will be granted at the restaurant, which offers 40 covers and views of the River Thames and the Marlow Weir.
Ross Kirton, director, licensed and leisure at Colliers, said: "This is an exceptionally stunning location and the restaurant is fitted to a high standard internally. We are seeking a premium, white table cloth or Michelin-quality restaurant occupier synonymous with the quality of the hotel.
"Marlow and its surrounding areas has become an established location for premium restaurant offers, including Tom and Beth Kerridge's Hand in Flowers, winner of the 2013 National Restaurant Awards earlier this month. The area also hosts an array of some of the UK's other favourite restaurants including The Fat Duck, The Hinds Head and the Waterside Inn."