my wife is not an American and is not in the states yet. But I pay all her expenses in her country. I'm her sole provider.

You still can't claim a spouse as a dependent.

Assuming your wife is a non-resident alien, you have two choices.  Very briefly, you can file as married filing separately and leave your wife off your tax return completely.   MFS has higher tax rates and some deductions and credits are limited.   Or, you can elect (choose) to treat your wife as a US resident for taxes, and file as married filing jointly. A joint return gives you a higher standard deduction and lower tax rates.  You must include all your wife's foreign income, no matter how small.  You will also need to apply for an ITIN -- international tax ID number for your wife -- and mail the tax return and the ITIN application to the IRS.  They will process the ITIN first and then the tax return once the ITIN is issued.  There is more here.

https://www.irs.gov/individuals/international-taxpayers/nonresident-spouse