In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
Parents cannot reject a marriage proposal from a man who is of sound faith and character for any cultural or ethnic reasons.
In responding to your question, Sheikh Ahmad Kutty, a senior lecturer and an Islamic scholar at the Islamic Institute of Toronto, Ontario, Canada, states:
It would be best if you persuaded your parents and convince them of your need to get married.
Perhaps you can also seek the help of wise people in your community to advise them to change their minds and consent.
If nothing works, you are free to get married. If you do, you should still try to keep good relations with your parents.
Almighty Allah knows best.