Glue, which previously handled VisitSweden's digital account, won the business after a pitch involving several other London-based agencies.
It will now also be responsible for overseeing VisitSweden's strategic development, as well as the creation and implementation of the brand's identity across all channels.
Glue first began working with VisitSweden in July 2009, after winning a digital pitch against an undisclosed Swedish agency.
Its work for the brand has included an online video series called "Dave Goes to Skane", which followed the exploits of a foul-mouthed Brit as he visited southern Sweden.
Last November, the agency also launched "The Super Swedish Lotto", a competition that gave users the chance to win flights to Swedish Lapland.