Welcome to the forums. Glad to see you’re having a nice peaceful relaxing day at your computer!
We would all love to give you some help on your problem, but there really isn’t very much information above.
There are lots of ways to ease quantities in and out between them. One highly-flexible way is to use an AnimationCurve:
From the output of that, you can multiply or lerp your Vector3 quantity in any number of ways.
For instance, here’s me using one to control a recoil “blip” pitch-up:
Hopefully the above gets you moving in the right direction.
If not, here is how to report your problem productively in the Unity3D forums:
If you post a code snippet, ALWAYS USE CODE TAGS:
How to use code tags: Using code tags properly