I turned Siri completely off but she is still giving me contact suggestions. It is also turned off for every other app in my phone. I contacted the help desk a few times for this issue and it is still happening.
iPhone 11, iOS 13
You must be mistaken.
Siri do not give contact suggestions.
Check your Settings > Accessibility > go through the options and switch OFF what you don't need (example: Spoken Content)
This discussion thread though very long but may have answer for you --> https://discussions.apple.com/thread/250695320?answerId=251750747022
Siri contact suggestions
