(prɪzʌmptʃuəs )

adjective [usually verb-link ADJECTIVE]

If you describe someone or their behaviour as presumptuous, you disapprove of them because they are doing something that they have no right or authority to do.

[disapproval]

It would be presumptuous to judge what the outcome will be. 

Synonyms: pushy [informal], forward, bold, arrogant  More Synonyms of presumptuous

https://dictionary.cambridge.org/dictionary/english/presumptuous