Can you study architecture anywhere in the world without a high school diploma?

No, you cannot study architecture anywhere in the world without a high school diploma (or its equivalent, such as a GED). A high school diploma or equivalent is a fundamental prerequisite for entry into virtually all higher education programs, including architecture. Architectural programs are rigorous and demanding, building upon a foundation of knowledge and skills typically acquired during secondary education. They require a certain level of maturity and academic preparation.