LTM | Preserve Client IP Address in L3 Mode

TLDR; Is there any way to 'preserve original client source IP address' in the packets sent from LTM to the realserver?

I am currently using a non-F5 SLB solution, looking to migrate to F5 LTM. But even before we begin to evaluate F5, we would like to get some feedback on the technical viability of one of my requirements because this is make or break for our consideration.

We have a critical application load balanced in L2 bridge mode, because the application requires the original client IP in the packet. But I am tasked with getting rid of L2 mode and move the application to L3 load balanced mode.

I have looked at DSR and SNAT, but they're not feasible for our environment.