No 357 sig and 357 Magnum are different rounds. The 357 sig is designed to function in a semi auto pistol while the Magnum is designed to run in rifles and revolvers.
You could use 38special will function in Your marlin

No. You need 357 magnum or 38 special only. Good luck.

Chris, no Sir. You will need .357 Magnum/38 Special and not 357 Sig which is a totally different cartridge - details here: quora.com/What-is-the-difference-between-a-357-and-a-357-magnum