What tree is this?

Hi!
I found a few of these saplings/trees in the woods of south Sweden and thought they could be a couple of young Swedish whitebeam. I already tried getting help from a swedish forum but it was pretty inactive. Can anyone confirm/deny?

It's a populus of some type, not sure what kind you have in Sweden.

I would also go for some kind of aspen.  The leaves are too thin and delicate for Sorbus and too diamond shaped.

As it appears so early in the Spring, the leaves not fully grown or formed, my guess is just that, but with good insight and clarity.  It appears very much like the young leaves of a Tilia cordata, 'Lind' or 'skogslind' in Swedish and in English; Small leaf lime or Little Leaf Linden. It is very closely related to the American Linden also called 'basswood'.  It is a very easy to carve light-colored wood and was traditionally used in the carving of alterpieces and figurines throughout much of Europe.

I have a very large and old Linden next to my garden and utilize the young leaves in salads every year, while my wife enjoys collecting the flower-heads to dry and use in her herb teas.

Lind ,  Tilia cordata