The singer was previously scheduled to honor his late father Alan Thicke at NHL100 Gala, reported People magazine.
Hockey legend Wayne Gretzky replaced Robin.
"My friend Alan Thicke would have loved to be here tonight with so many of the great players that he admired. I am extremely honored to be included on this amazing list, I only wish that everyone of the players could have been here tonight.
"So with the help of my friend John (Ondrasik) let's pay tribute to the players we've lost who have earned a place on the Great 100 list. Alan this is for you," Gretzky said.
The couple's custody dispute has become increasingly fraught after a LA judge denied Patton's request to limit Thicke's joint custody of their son, earlier this month.
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