Maybe a small Galearis spectabilis. Hard to really see the flower from the pictures.

I agree that it is a cosmos. In our area/zone it is an annual that can reseed. I grow these plants from seed in early spring..Different varieties are from 18" to 3' tall.Someone possibly had sowed the seed or had a plant in the garden previously. Or a bird could have 'deposited' the seed. Here is one in a deep golden yellow that I grew from a free pack of seeds. Jane

It resembles an Erigeron. MaryAnn I am on a PC. I click on the Photo button as seen below (when you post) and it brings up the files where I have my pics stored on my computer. I just scroll through until I come to the pic I want. I hope that was helpful to you.

Try Name that Plant forum. It is interesting.