According to the writers’ group, the embassy, in an email rejecting Mr. Dash’s request, cited concerns that he might try to stay in Sweden, or another of the European Union countries known as the Schengen area. “You belong to a category of applicants where there is always a risk involved when granting a visa that you will not leave Schengen area after the visit,” the embassy wrote. “Furthermore, the purpose of your trip is not urgent enough to grant you visa.”

The Swedish Migration Agency confirmed to BBC News that it had rejected Mr. Dash’s request for a visa.

The writers’ group, which promotes literature and freedom of expression, said that with Mr. Dash’s killing it would demand further explanation from the embassy.