The developing big man injured the posterior cruciate ligament in his right knee and a Gold Coast spokesman confirmed to AFL.com.au that Lynch will have scans in Melbourne on Monday.
Depending on the severity of the injury, Lynch could miss several weeks.
Lynch's injury is set to test the Suns' big man stocks, with the club already losing ruckman Zac Smith (knee) for the season, while Charlie Dixon struggles to overcome an ankle injury.
Despite a minor foot complaint, speedy half-back Joel Wilkinson is almost certain to be available for the Suns' next game, after the bye, against Adelaide on June 29.
Wilkinson played out the game against Essendon and after completing the necessary rehab, will be right to take his place against the Crows.
Ben Guthrie is a reporter for AFL.com.au. Follow him on Twitter: @AFL_BenGuthrie