Translation:Why was your budget not approved?
'Why your budget was not approved' is only a sentence fragment. It is not a sentence, nor is it a question. Question options are "Why was your budget not approved?" or "Why wasn't your budget approved?". To make it a statement we could say "This is why your budget was not approved."
The Indonesian phrase is a question as it has a question mark. If it didn't have the question mark, I don't know whether it also could be interpreted as a sentence fragment? But putting a question mark at the end of the English sentence fragment still does not make it a question.