I'm not sure whether you're talking about laser treatment...or electrolysis.
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For electrolysis, I would say that you shouldn't.
If the hair isn't there, the electrologist can't treat it. So while it may be easy to pluck them, it will slow down and hinder progress toward your end goal of removing the hair completely...because they will grow back eventually, since the root is still there.
That said...I do find that a few days after electro (I've been doing it for a little over a year now), I have to pull a few hairs bits from my face that are being pushed up through the skin (they tend to get stuck and cause issues if I don't ). These are very short though, and don't have a follicle, so I can't really call it plucking, since they're not rooted to anything.
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For laser...I have no idea what effect it will have. Though...because laser appears to work best on darker hair...if you've removed the hair completely I think the result would still probably not be favorable in the long run.
However...if you've just had a treatment, this could be the hairs falling out that have been treated. I've never had laser, so I don't know what you should expect with that.
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Either way, good luck with the hair removal.