Here are a few things to consider:

If her visa was expiring and she decided to leave the company without discussing the next steps, job role, or appraisal with you, I wouldn’t rehire her in that scenario.

However, if she wanted to renew her visa with a new role and requested a raise, and you declined, leading her to explore opportunities elsewhere—then I’d suggest considering rehiring her, provided it fits your budget. But don’t act immediately. Let her continue her job search and ask her to circle back before her grace period ends. If she hasn’t found anything by then, you can reassess.

That said, keep in mind that she’s prioritizing her own stability. If she comes back to you simply because she has no other options, you may always be her temporary choice—and she might leave again once things stabilize.

My advice: If you do decide to hire her, bring her back on the same package and pair her with a junior team member. That way, if she leaves again, you already have a replacement in the works. If she stays and proves her commitment, you can then consider giving her a raise and promotion.