The Holland fullback is now set to come off contract next week.
We have not reached an agreement with Swansea," Tiendalli's representative Sebastien Casenaz confirmed to talkSPORT.
"Dwight has been very good this season and the caps he earned with the Dutch national team came as a reward for his performances on the pitch with Swansea.
"As a free agent, off course Dwight is attracting interest from clubs in England and Germany. Currently, discussions continue."