The Leeds boss refused to comment specifically on the Watford forward but has been discussing the side's transfer policy in detail.
But the Whites head coach did suggest the club are working on potential new transfer deals.
And Rosler also went on to outline several key criteria any new Leeds signing will need. Essentially, the 'right player' for the 'right price' is a young player who can suit the 'rock and roll football' brand.
United, though, are almost certainly looking to expand on their currently thin squad.
The German refused to comment specifically on Watford's Forestieri but Rosler did tell BBC Radio Leeds: "Yes, we want to add to our squad. When it's on, when we think the price is right, when we think he can suit into what we are doing in terms of wages, age and style of play.
"And when the chairman is determined to do something. But it has to be the right player and the right price. I know the club are working on certain scenarios."
Rosler's comments, by design, are ambiguous but the Leeds boss's tone suggests the club are certainly working on something behind the scenes - as well as his confirmation at the end.
Whether the Watford forward is worth pursuing for the Yorkshire side, only time will tell. Rosler is obviously relaxed about the club's transfer situation, however, despite recently acknowledging the need to strengthen. Recently, meanwhile, the German admitted the loan market is something Leeds could look to exploit.