He will now petition the Supreme Court of Appeal.
Rohde was convicted on November 8 last year for the murder of his wife Susan Rohde. He was found guilty of strangling her and then staging the murder as a suicidal hanging.
Susan was found with an electric cord wrapped around her neck, hanging from a hook behind the bathroom door of the room the couple shared at the Spier Wine Estate hotel in Stellenbosch on July 24, 2016.
Following the conviction, Rohde was sentenced to an effective 20 years imprisonment; 18 years for the murder and five years for obstructing the ends of justice. Three of the years in the second count would run concurrently with the murder sentence.