Write to higher official in your company and also point out in polite manner that other people have been allowed to quit on 10 days notice and that your manager is not showing humanitarian concerns.
Do not think of legal proceedings and you need time to care for your parents.
Organisation cannot do anything to you legally in an easy manner.
19th May 2016 From India, Pune
You have mentioned that people were relieved in 10 days, have they been let go after they paid the Notice period or not is no know to you. If the service conditions mention 3 months notice period, then the company has all the right to ask you to serve the entire notice period and deny the recovery towards the same.
Also you can request the management for early relieving, but not demand the same.
Speak to higher management on the same, with your problems and not the comparison with others.
19th May 2016 From India, Mumbai
Be genuine, and they will understand. If you have created a story, to join somewhere else, they will not budge. Forget about legal options.
21st May 2016 From Qatar, Doha