Salah Abdeslam, the prime surviving suspect in November's Paris attacks, will no longer fight extradition to France.
He wants to return to his home country to explain himself as soon as possible, his lawyer says.
"Salah Abdeslam has asked me to inform you that he wishes to leave for France as quickly as possible," Sven Mary said on Thursday in comments broadcast on BFM TV, speaking from Brussels.
Mary said he hoped this could happen "as soon as possible", adding that Abdeslam "wants to explain himself in France".
Paris prosecutor Francois Molins said last week that at worst it could take three months for Abdeslam to be handed over to France after he said he would oppose extradition to his homeland.
Abdeslam is due in court in Brussels on March 31 for the execution of a European arrest warrant issued by France.
Abdeslam, a French citizen, was arrested in Brussels on March 18 after a four-month manhunt in the wake of the November 13 shooting and suicide bombing rampage by Islamic State militants that killed 130 people in Paris.
Investigations into suicide bombings in Brussels on Tuesday - also claimed by Islamic State and in which at least 31 people died - have pointed in Abdeslam's direction as well, indicating that the same jihadist network was involved in both the Paris and Brussels attacks, police said.
Asked whether Abdeslam, born and raised in Brussels, was still helping police investigators, Mary declined to comment, citing client confidentiality.
Mary had said on Monday that Abdeslam was collaborating and communicating, and that he was "worth his weight in gold" for the investigation.
As the only suspected participant or planner of the Paris attacks in police custody, Abdeslam would be a possible significant source of information on others involved in support networks, financing and links with IS in Syria, investigators have said.
