Does Europe have equivalent of dollar store or dollar tree?

It's hard to give an answer each country is really different

I'm pretty sure every country has their own version.

I don't know... Does Dealz count? Dealz is part of the Poundland family so I feel it should.

i used to pass a dollar store on the bus a lot. so yes.

In Spain we have "los chinos" basically stores owned by Chinese people, they sell everything from a pair of socks to a toilet brush, and everything is cheaper than average.

In Germany I've only seen Euro Shop, which is basically the same.

We had it once, not anymore. Or at least i haven't seen one in a whiiiiiiiile