Marcel Theunissen (born 9 June 1999) is a South African rugby union player for the Stormers in Super Rugby.
[2] His regular position is flanker.
Theunissen was named in the Stormers squad for the Super Rugby Unlocked competition.
[3] He made his debut for the Stormers in Round 4 of Super Rugby Unlocked against the Bulls.
This South Africa rugby union biography is a stub.