The 'Blade Runner' is currently on bail and local media reports suggest he requested the memorial service to allow him to grieve at his partner's death.
Pistorius' family members will attend the private Pretoria service which will take place at the house of Arnold Pistorius, Oscar's uncle.
The South African media have been asked to respect the Pistorius family's privacy.
More top news
Sir Alan Parker said there is an ‘urgent and pressing need to rebuild trust and confidence’ in the charity sector.
Maksim Borodin died on April 14 from injuries sustained in a fall from his five-storey balcony.