Answer: The good news is that lilacs are relatively hardy plants and they tend to send suckers up from the root system. This is a good thing, especially if the entire plant dies down to ground level. So, even though your plant looks pretty sorry now, I think it will recover. Don't do any pruning right now - your lilac needs to spend its energy re-establishing its root system, not putting out new growth. Wait 3-4 weeks until it perks up. Once it does, you can prune away any dead branches. Best wishes with your lilac!
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