If you don't know How To Deactivate Linkedin account on Android then follow these steps:-
1. Launch the LinkedIn app and tap your avatar icon (upper left).
2. Tapping Settings > Account Preferences.
3. Scroll down to Account Management, then tap Hibernate Account.
4. Read the information provided, then tap Hibernate.
5. Pick a reason and give feedback (optional) before tapping Next.
6. Input your password.
7. Tap Hibernate Account to confirm.