If required, you can enable Do Not Disturb (DND) mode for certain selected or specific Contacts on iPhone, instead of allowing the “DND” mode to block calls and messages from everyone. You may want to do this, if there a specific person or group of people that you want to prevent from contacting you during a specific period of time.
For example, you may want to prevent a specific person or certain people from influencing you in any way, while you are in the process of awarding a Contract or making an important personal or business related decision.
Enable “Do Not Disturb” for Specific Contacts on iPhone
You can enable “Do Not Disturb” for specific Contacts by adding your selected Contacts to the People tab in DND Mode and configuring DND mode to block calls/messages only from these selected Contacts.
This will result in all calls and messages from these selected individual Contacts being silenced, as long as your iPhone remains in “Do Not Disturb” mode.
The good thing about this setup is that call and message notifications from these Contacts (If any) will still be available on your device and you will be able to check them and call/message these Contacts, in order to explain the situation (if required).
1. Enable “Do Not Disturb” for Selected Contacts on iPhone
You can find below the steps to configure “Do Not Disturb” mode to silence calls and messages from specific or certain selected Contacts on your iPhone.
1. Go to Settings > Focus > Do Not Disturb and tap on the People tab.

2. On the next screen, select Silence Notifications from option and tap on Add People icon.

3. On the next screen, select the Contacts that you want to Silence Notifications from.

4. Once you are done adding your selected Contacts, tap on Done to save this setting on your iPhone.
After this, your iPhone will not bother you with Notifications; when these selected Contacts try to contact you by calling or messaging your device during your set “Do Not Disturb” period.
2. Remove Contacts from “Do Not Disturb” Mode on iPhone
Whenever, the purpose of adding these selected Contacts to “Do Not Disturb” is completed, you can remove them from “Do Not Disturb” mode.
1. Go to Settings > Focus > Do Not Disturb > tap on the People tab.

2. On the next screen, tap on the minus icon located above the Contact that you want to remove from “Do Not Disturb” block on your iPhone.

Once you tap on the minus icon, the Contact will be removed from “Do Not Disturb” mode block on your iPhone.