Can someone qualify for the DACA if they have a high school diploma from a foreign country?

There is no rule on the subject. However it appears to me that you would have to prove that your degree is the equivalent to a US High School Diploma. Moreover, if you did not live in the U.S. during high school, as a matter of discretion you should wonder if they would approve your case.

graduated from HS in USA or have a GED or be enrolled in a program. Also, if you graduated HS in a different country - you probably do not meet the entry age requirement. I would recommend speaking with an attorney.

I am concerned that, if you have a HS diploma from a foreign country ... you might not have been less than 16 when you entered the US. Meet with an attorney.

The problem with DACA is that everything is discretionary and are being handled for the first time and guidelines do not address all issues.