Murray, a two-time singles champion at Wimbledon, was playing at SW19 for the last time before retiring later this year.
The Scot is said to be “disappointed” that he is unable to play alongside 2021 US Open champion Raducanu, who missed Wimbledon last year after having surgery on both wrists.
Murray’s mother Judy, in response to a post on X from television presenter Marcus Buckland describing Raducanu’s decision as “astonishing”, wrote: “Yes, astonishing.”
Murray was not permitted to find a replacement partner for Raducanu under tournament rules because the draw had already been made.
Murray and Raducanu, who were set to play China’s Zhang Shuai and El Salvador’s Marcelo Arevalo, have been replaced by an alternate pairing.
It means Murray made his final appearance on Thursday when he lost alongside older brother Jamie in the men’s doubles.
A video montage of Murray’s career was played on the Centre Court big screen after the match, leaving the former world number one in tears as thousands of fans showed their appreciation.
Murray pulled out of the singles on Tuesday as he continues to recover from a back operation on 22 June.
The three-time major champion is planning to retire later this year, with the Paris 2024 Olympic Games set to be his final event.