He is returning home early after the sudden death of his father on Tuesday.
"At this sad time our thoughts are with Matt and the Saunders family," Highlanders general manager Roger Clark said today.
As a mark of respect the Highlanders will wear black armbands during the game.
Saunders is expected back in New Zealand tomorrow.
The Highlanders have made a bold start to their season, with three successive wins, including a huge upset over the Bulls last weekend, leaving them as the only unbeaten New Zealand team.