Oscar Pistorious AFP Photo

 Disgraced Paralympic athlete Oscar Pistorius is suffering from depression, anxiety and stress and is not able to testify at his sentencing for murdering his girlfriend, a psychologist told a South African court on Monday.

 "He appeared to have limited energy... he displayed signs and reported symptoms of post-traumatic stress disorder, anxiety disorder and depressive disorder," Jonathan Scholtz said, after interviewing Pistorius.

"Currently he is not able to testify. His condition is severe."