Pistorius, an Olympic and Paralympic sprinter, has admitted to shooting dead his model girlfriend, Reeva Steenkamp, but maintains he mistook her for an intruder hiding in his bathroom in an upscale Pretoria suburb.
The trial, which began in March, took a month-long break to allow the 27-year-old to undergo a mental evaluation at Pretoria's Weskoppies hospital after a forensic psychologist brought by the defense testified that Pistorius had an anxiety disorder.
Judge Thokozile Masipa said it was important to find out whether or not the condition affected his criminal responsibility.
"At the time of the alleged offences, the accused did not suffer from a mental disorder or mental defect that affected his ability to distinguish between the rightful or wrongful nature of his deeds," Prosecutor Gerrie Nel read from a report submitted to the court.
Both Nel and defense lawyer Barry Roux accepted the findings of a panel of psychiatrists and psychologists after 30 days of evaluation.
During the trial, prosecutors have tried to paint a picture of a self-obsessed Pistorius who knowingly killed his law graduate girlfriend as she cowered behind a locked bathroom door.
Pistorius could face a life sentence if found guilty of the shooting on Valentine's Day last year.
Pistorius competed against able-bodied sprinters on carbon-fiber prosthetics, becoming one of the most recognized names in athletics. Besides a variety of Paralympic medals, he reached the semifinals of the 400 meters at the London 2012 Olympics.