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Hey vitaliy243,

Thank you for using Apple Support Communities!

I see from your post that you're needing to retrieve some deleted messages on your iPhone. I'd be happy to help out.

If you are using messages in iCloud, once a message is deleted from a device, it is permanently deleted. You can confirm if you had messages in iCloud turned on by checking out this article:

Keep all your messages in iCloud

If you aren't using messages in iCloud, you'll need to restore from a backup that contains the messages:

Restore your iPhone, iPad, or iPod touch from a backup - Apple Support

Please note that this will restore all settings from this backup as well as remove any new data added to your device after the backup was created.

Cheers!

You were provided an answer by DanielleM82. Follow the links provided. You need to restore your phone to a backup of the iPhone that was made when the message was on the phone.