Sweden captain and record scorer
The 34-year-old, who is available on a free transfer after leaving Paris St Germain, has been strongly linked in media reports to a reunion with former coach Jose Mourinho, who was named manager of the English Premier League side last week.
"We have days off. We plan our activities and the players can act based on that," a mildly irritated Hamren told reporters. "I'm not going to speculate about such things."
Ibrahimovic sat out Tuesday's drab goalless draw with Slovenia to rest a sore calf, but will start in Sweden's final pre-Euro 2016 friendly against Wales in Stockholm on Sunday.
The Swedes have named a strong starting team to face the Welsh and Hamren plans to use all six substitutions to get a good look at his fringe players.
"My idea is that as many as possible would get game time," he said.
"That won't be the case for the goalkeepers, but otherwise it is my hope that everyone will have some minutes in their legs before we go to France."
Sweden kick off their Group E campaign against Ireland in Paris on June 13 before facing Italy and Belgium.