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
The expansion of the London airport will affect the whole of the UK, with more domestic routes, while impacting air fares and house prices.
A campaign to remove the term 'Essex Girl' from the dictionary due to its sexist and derogatory connotations is gaining traction.
A victim of sexual abuse by a paedophile imam has criticised police after her attacker fled the country during the middle of his trial.