To claim a parent as a dependent, they must be a US resident (meet the substantial presence test), and you provided more than half their support, and they had less than $4050 of taxable income, and they have an SSN or ITIN.
If they were not in the country long enough to be considered a "resident" by the substantial presence test, they can't be a dependent.
If you run the interview and it won't allow you to claim them, check your answers with reference to my comment above.
