Buddhism is a relatively small religion in Sweden. Most of the practicing Buddhists have various Asian (mostly Thai, Chinese and Vietnamese) heritage.
A Buddhist Temple was planned for Fredrika, a small town in the north part of Sweden. This Thai-style temple would be the biggest Buddhist temple in Europe when finished.
There is a Thai pavilion in Jämtland, a region in central Sweden.
A 500s AD Kashmir Indian made Buddha statue made of bronze was found at Helgö in Sweden dating from the Viking era.
References
Buddhism in Sweden Wikipedia(Text) CC BY-SA