Yes there are Buddhists in Bangladesh. But majority are muslims

Buddhism is the religion they have in common.

According to Wikipedia, Bangladesh- Islam (89.6%), Hinduism (9.6%)

Bhutan- Buddhism (76%). Hinduism (23%)

India- Hinduism (80.5%), Islam (13.4%), Christian (2.3%)

Maldives- Islam (According to the revised constitution, article nine says that "a non-Muslim may not become a citizen of the Maldives")

Nepal- Hinduism (80.6%), Buddhism(10.7%)

Pakistan- Islam (97%)

Sri Lanka- Buddhism (70%), Hinduism (15%)

Hinduism & Buddhism.

Islam is also practiced as dominant religion in all countries that are west of India, Bangladesh, Malaysia & Indonesia.

1. Today, Buddhism is found in Thailand, Sri Lanka, Myanmar, Cambodia, Laos, Japan, China, etc, and in some parts of India, Pakistan, Bangladesh and Nepal, also in the European countries and the USA. It is believed that the Buddhist population of the world is over 500 million.