Last September, Sweden became the only European Union country to offer permanent residence to Syrians fleeing their devastated homeland. Now, strained by its own generosity, it is losing patience with what is calls a lack of solidarity from its European brethren.

"Nine member states in the EU today receive 90% of all asylum applications annually but those nine states are starting to, well, become fed up," Tobias Billström, Sweden's immigration minister, said in an interview. He's asking the European Commission to...