EB3 Green Card
FAQ: Can EB-2 approved file for EB-3?
I have given a few examples on my blog please look at that.
EB-3, whether for nurses or any other worker, requires either 2 years of experience OR a bachelor's degree.
There can be no RN green card without an employment in the USA and clearing of the required exams/licenses in the USA. As to EB-2, that would depend upon whether or not the job requires 5 years of experience after Bachelor;'s degree (or a Master's degree).