Garmin-Sharp rider Alex Rasmussen says he has been prevented from competing in the Circuit La Sarthe-Pays de la Loire by the International Cycling Union.
The 28-year-old Dane was hoping to make his return following an 18-month suspension for violating the whereabouts system.
Rasmussen wrote on Twitter: "Just got taken out of La Sarthe by the evil and powerful UCI. Lifetime ban in effect by the UCI apperantly (sic)."
The UCI clarified Rasmussen has not been banned for life and the withdrawal was due to unfiled paperwork.
A UCI spokesperson explained by email: "He was not eligible to race as the documents he was required to provide to Ernst & Young to allow registration were not provided in time.
"But the required documents have now been provided and he is now registered."
The Circuit La Sarthe began today and finishes on Friday.
"UCI came five minutes before the start and told me I couldn't start because of insurance," Rasmussen told Cyclingnews. "Didn't specify [the reasons], so now I'm in the camper.
"It's really weird since I got the back (race) numbers and everything. I'm just stunned at the moment. Can't really believe that I'm not racing."
Garmin-Sharp is renowned for helping to reform those with doping convictions, including Briton David Millar.
Christian Vande Velde, Tom Danielson and David Zabriskie made their returns from six-month suspensions at the Volta a Catalunya last month.
The trio, along with Garmin boss Jonathan Vaughters, provided evidence to the United States Anti-Doping Agency which resulted in a life ban for Lance Armstrong.