The former athlete is serving a 13-year-plus jail sentence.
State prosecutors had argued the athlete's sentence was too lenient.
He received six years for murder, while the minimum sentence in South Africa is 15 years.
The Paralympian's lenient sentence perpetuates the belief that South Africa's justice system is unfair.
Pistorius was imprisoned for six years for murder, nine years less than the mandatory guideline.
Reeva Steenkamp's best friend expressed dismay, while Pistorius's brother praised the judge.
After more than two years in court, Oscar Pistorius has been sentenced for murder.
The broadcasting of Pistorius's interview so close to his sentencing has raised questions of fairness.
The father of Pistorius's murdered girlfriend has testified for the first time in the trial of the South African athlete.
The South African athlete will be sentenced on a murder charge by Friday.
Oscar Pistorius has been granted bail by the North Gauteng High Court and told that he will remain under house arrest until his sentencing for murder on April 18, 2016.
Judge says previous conviction was erroneous and that athlete has 'never offered an acceptable explanation'
Roughly a year ago, Pistorius received a five-year sentence for killing his girlfriend.
The South African runner had been due to leave jail for house arrest in August.
The Paralympic champion was found guilty of the culpable homicide of his girlfriend.
The verdict has been criticized by several legal experts and the Women's League of the African National Congress
South Africa's state prosecutors will appeal the culpable homicide conviction and five-year jail sentence given to the Olympic and Paralympic star last week
A social worker has argued that the athlete could be vulnerable to gang rape if he receives a prison sentence
The disgraced athlete will attend sentencing hearings which will determine whether he serves jail time for the killing of Reeva Steenkamp
In sport Pistorius was heralded for wanting no special treatment, but as he faces his sentence he will hope to get all the special treatment that will keep him out of South Africa's toughest prison
Judge Masipa concluded Pistorius "acted too hastily", "used excessive force" and was "clearly" negligent.