"While his physical safety is of primary concern, it is important to note that the conditions of Mr. Manafort's confinement have taken a toll on his physical and mental health," the document said. "He also suffers from depression and anxiety and, due to the facility's Visitation regulations, has had very little contact with his family."
Manafort has only stepped out of the jail facility to meet with Special Counsel Robert Mueller's office and investigators and to appear in court, the document said.
READ MORE: Manafort Not Requesting Hearing on Breach of Plea Agreement
Mueller said in a court filing last month that Manafort broke his plea deal by lying about his contacts with Russian officials and the White House while he was in prison.
Mueller's filing said Manafort "breached his plea agreement in numerous ways by lying to the FBI," including about his interactions with Russian associate Konstantin Kilimnik. The document also stated that the former campaign manager provided wrong information about a wire-transfer to a firm that was working for him.
Manafort reached the plea agreement with Mueller in September after a jury found him guilty of eight charges of tax evasion and bank fraud by a jury in the US state of Virginia in August.