I wouldn't be too sure about that.
While I think the probability is lower that he goes with a higher pick, I can't say it's completely far-fetched --- especially when you get to the five range. You can make the argument he's the best center heading into the draft and is just as much in the mix as some of the other names, even if his name hasn't been bantered about for as long a period of time.
Three seems like it would on the high end and significantly less likely, but five isn't really that far off.
If your Montreal, and you view Kotkaniemi has being right up there with the guys like Zadina, or Tkachuk, I think you slide down a couple of spots and see if you can pick up another pick or prospect. But I don't think you want to slide too far down and increase your risk if you view Kotkaniemi that high.
I think both Chi and the Rangers would have Kotkaniemi on their raders, but I don't know if Detroit and Vancouver aren't leaning more towards a defenseman and or Wahlstrom at this point. So if Montreal is interesting in Kotkaniemi, and is looking to trade down, it's about finding the balance between still being in a position where they don't trade themselves out of the picture, and find a partner who is interested and willing. In that case, I can't help but think Arizona makes the most sense, if there's any sense to be found.