The former senior Sinn Féin official and British agent shot dead in Donegal last week has been quietly buried in his native Belfast.
Fewer than 100 people attended the graveside ceremony at the City Cemetery in west Belfast on Saturday.
The funeral and interment followed a private Mass at the murdered man's former home in the west of the city which he left after admitting he worked as a spy last December.
Mr Donaldson's family confirmed late last week that the dead man's body would be returned to Belfast for burial but were vague about the timing. The funeral arrangements were not made public.
Mr Donaldson had been living at a remote cottage owned by his son-in-law five miles north of Glenties in Co Donegal when he was shot dead by one or more gunmen who forced their way in.
Mr Donaldson had been Sinn Féin's senior administrator at Stormont at the time the institutions were suspended in 2002 following allegations of a republican spy ring.
He firmly denied this after charges against him and his two co-accused were sensationally dropped having been deemed not to be in the public interest.
However, within days he was "outed" as a British intelligence agent of some 20 years' standing. He publicly confessed his actions on RTÉ and is then thought to have fled for the Donegal Gaeltacht.
Results from a postmortem examination carried out in Letterkenny showed he died last Tuesday from gunshot wounds to the chest and head and that he had also been badly wounded in the arm as he tried to protect himself.
The IRA, through a statement signed by P O'Neill, has denied killing him. The Donaldson family also said they believed the IRA was not involved.
In a statement issued through their solicitor, the family said they did not know who murdered the 56-year-old but pointed to the "activities of British intelligence" for what they called their "difficult situation".
Northern Secretary Peter Hain has said that theories of British intelligence involvement in the Donaldson murder were "fanciful and rather desperate" and that republican dissidents were possibly to blame.