I'm sure 3-Chloro would work, but I think it'd be a pretty big let-down. Potency wise I'd guess at it being as potent dose-wise as Ketamine at best. It'd probably also be closer to an inferior more sedated Methoxetamine in effects - which, with the notably decreased potency makes it seem a silly choice. Just speculation though, I may be wrong. I'd sooner try 3-MeO though - simply for the reason that I'd expect 3-MeO-2-Oxo-PCP (3-MeO-Deschloro-Ketamine) to be closer to 3-MeO-2-Oxo-PCE (Methoxetamine/MXE) than 3-Chloro-2-Oxo-PCP would be to 2-Chloro (Ketamine itself) - and for the higher potency.
Although here we see Ethyl analogues seemingly being more potent than Methyl analogues, we've seen that for the vast majority, Ketamine is preferred to N-ethyl-Norketamine, and the 3-MeO derivative would just be MXE with the N-Ethyl replaced with an N-Methyl, as with Ketamine vs NENK - so could get something nice. Though it'd probably be illegal in most of the places where MXE is now illegal.
There's a lot of other interesting analogues that'd probably be better investments than the 3-Chloro, particularly considering these aren't exactly the easiest of drugs to synth - no sense wasting an investment on a let-down imo. 2-Fluoro-2-Oxo-PCP (2-Fluoro-Deschloroketamine, or 2-Fluoro-Ketamine by the naming standard 2-MeO-Ketamine uses) or 2-Fluoro-2-Oxo-PCE (2-Fluoro-Deschloro-NENK) though might be nice.
I seem to remember finding a report for 2-Fluoro-Ketamine a while back that suggested unlike 2-MeO it was very hard to tell apart from Ketamine, only subtle differences.