Honestly, I've been exactly where you are, so let me be straight with you.
No. You cannot withdraw ELSS before 3 years. Full stop. There's no exception — not for medical emergency, not for death, not for anything. The 3-year lock-in is absolute and SEBI mandates it. The AMC system simply will not process a redemption request before the lock-in period ends. Your Mirae Asset and Axis units are locked until each SIP instalment completes its own 3 years individually. This is the part most people miss — it's not 3 years from when you started the SIP. Each monthly instalment has its own separate 3-year clock. So your January 2024 SIP unlocks in January 2027, February unlocks in February 2027, and so on.
Now about the tax benefit — here's the good news. Even if you were somehow able to withdraw (you can't, but hypothetically), the 80C deduction you already claimed won't be reversed by the IT department because the lock-in itself is the compliance mechanism. There's no clawback provision in the Income Tax Act for ELSS unlike NSC or some other instruments.
For your immediate medical emergency, here's what I'd actually suggest:
First, check if you have a health insurance policy — yours or your mother's. Many floater plans cover parents. IRDAI mandates cashless treatment at network hospitals so that's your first call.
Second, look at a personal loan. HDFC Bank, ICICI, even Bajaj Finserv give quick personal loans. Yes there's interest but it's better than destroying your tax planning.
Third — and people really overlook this — you can take a loan AGAINST your ELSS units. HDFC Bank and a few others offer this. You won't get the full NAV value but you can get 50-60% as loan while your investment stays intact and keeps growing.
Fourth, SBI and most banks let you withdraw from PPF partially after 6 years for medical reasons if you have that.
Don't panic and don't try to find loopholes here. The lock-in is genuinely hard. Focus on other liquidity sources first.