Which stream of engineering is having the most minimal portion of maths?

If you are afraid of maths then it is better not to pursue engineering. Almost all branches will have significant maths or related subjects. Maths and physics form the basics of Engineering. Rather than pushing yourself to pursue engineering, find out other fields of interest.

Chemical engineering has a little or no mathematics.

If you don't want maths as a subject in engineering better don't go for engineering because you will face maths, either go for other courses which don't have maths. for ex:- Journalism I have seen a lot of people who chose science maths in there 12th but they chose journalism for the grad and they