On September 21, 2017, Suzuki made his Colts debut, as he scored a goal against Olivier Tremblay and added an assist in an 11–2 victory over the Ottawa 67's.
On March 22, Suzuki appeared in his first career OHL postseason game, as he was held off the score sheet in a 6–2 loss to the Mississauga Steelheads.
On April 4, Suzuki scored his first career OHL playoff goal against Jeremy Helvig of the Kingston Frontenacs in a 6–5 Colts victory.
In 12 playoff games, Suzuki scored a goal and four points, as Barrie lost to the Frontenacs in the Eastern Conference semifinals.
One week later, on September 27, Suzuki tied his career high with five points in a game, as he scored a goal and four assists in a 10–3 win over the Sudbury Wolves.