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
Chancellor Philip Hammond said the UK will make a financial proposal to the EU in the next three-and-a-half weeks.
Remaining cold across the far north of Scotland over the coming few days.
A former ally of Robert Mugabe and for years his enforcer, the man known as 'the crocodile' may soon take his boss' job.