Dear Tina,

I am wondering how long the dwarf pine has been in  the ground? It definitely looks like it is dying. It's possible if recently planted it didn't handle the transplanting well. Or, there may be something in the soil that it didn't like. Also, transplanted trees require more water, so the drought might have had an effect on it.  I really cannot say for sure based on just the picture, but here is some additional information that might be helpful:

BP-31, Ornamental Diseases (purdue.edu)

ppfs-or-w-19.pdf (uky.edu)

Stress-related Conifer Dieback (purdue.edu)

There is a slight chance that it could be seasonal needle loss but from the picture it seems like an awful lot for that. But, since that could be a possibility, I've included information here:

Why Ever is my Evergreen Brown? | News (iastate.edu)

If this is a newly planted shrub, transplant shock seems reasonable. If it has been in your landscape for quite some time, there are some diseases that could be the culprit. Here is information on potential diseases of white pines:

Eastern White Pine - Modern Disease Threats to a Historically Important Species (psu.edu)

Pine Diseases | Home & Garden Information Center (clemson.edu)

Please let me know if you have any additional questions.