Help?

Here's a couple more images.

The leaves and growth habit look very much like blackcurrant, do you have any such or similar fruit shrubs? They make tiny flowers in clusters on stalks off the branches, when pollinated the backs will start to swell. Rub the leaves to see if they smell, blackcurrant leaves smell like blackcurrants.

I have no idea. It's a huge bush in the front yard. It's our first spring/summer here in ND.

Agree with Ribes.

Could be also perhaps Gooseberry?

A likely candidate would be Ribes alpinum. It was heavily sold at nurseries in the 70s, 80s and 90s.

I have gooseberries and the flowers are in a different configuration (hang down more) , but the leaves look almost identical to currents.

gooseberries in flower in April

Gooseberries generally have thorns, which this plant doesn't seem to have. I agree with Rick, likely Ribes alpinum... and that is a blast from the past - I remember planting these way back when! Very early to leaf out, which is certainly appreciated in cold zones.