If you have no United States sourced income, and if you sent an amended return for your spouse as married filing separately, then you are done.
You do not need to file a tax return if you have no United States sourced income. The IRS either will or won’t issue the ITIN, depending on how your situation fits their rules, but as long as you don’t have any financial connection to the United States, you don’t need an ITIN.
