The owner, Lasse Stærdal Sørensen, believes it will be difficult to recapture them.
"I know it's incredibly difficult. I've been involved in capturing escaped kangaroos before, and we haven't always succeeded," he tells Danmarks Radio.
When he went out to his kangaroos in the morning, he discovered that the gate was open.
The police in southeastern Jutland have been contacted but are keeping a low profile as long as the three animals do not become a traffic hazard.
