(even) if only a little; to some extent; in the slightest way
多少なりともお役に立てれば。
If it could be of even slight use.
多少なりとも力になれればと思います。
I hope I can be of some small help.
多少なりとも関わった者として、責任を感じています。
As someone who was even slightly involved, I feel a sense of responsibility.