The 35 Whelen produces too much pressure to be used in a Marlin levergun. It probably wouldn't chamber anyway--cartirdge dimensions for both calibers are very different.
Here is a visual comparison of the the 2 rounds to show how different they are
https://images.app.goo.gl/b6RLRdQp1ZXCKQta9
The correct "35 Remington" ammo can be found here.
308ammo.com/HORNADY-35-REM-LEVERevolution-200gr-FTX-p/82735.htm

Michael, absolutely not Sir. Different case lengths and operating pressures make this a powder keg in the Marlin 336. Cheers and stay safe!

35 Whelen is a significantly longer cartridge than 35 Remington so it wouldn't fit in the chamber. Not to mention the fact that it is a significantly higher pressure cartridge, nearly double, and would not be safe to fire in anything designed for 35 Remington.