Hello Aspirant,

Yes, they do come under the 3B category.

Category-3B

• There is a reservation of 5%  for communities under this category.
• Christians, Jains, and Digambar with other communities are included.
• The population of religious minorities is 16.28% of the entire population of the state. Muslims, Christians, Jains, Sikhs, Buddhists, and Parsis in Karnataka are regarded as religious Minorities.

I hope it helps.

Thank you.