"He will not be able to compete for five years. For us he would have to serve the whole term even if he was released early," International Paralympic Committee spokesman Craig Spence told AFP.
Pistorius, 27, was jailed for five years on Tuesday for culpable homicide over the killing of his girlfriend Reeva Steenkamp. A member of Pistorius's legal team, Roxanne Adams, said Pistorius could be transferred to house arrest after 10 months.
The next Paralympics are in Rio de Janeiro in 2016 but the organisers said Pistorius could only consider competing if his sentence was reduced on appeal.