Contacts suddenly missing

Hi there, paddypurcell! Thanks for reaching out to Apple Support Communities. 

After reviewing your post, it sounds like you are missing some of your contacts and have been left with just numbers. We definitely understand that missing those important business contacts can be a concern and we'd love to help. Let’s start by reviewing the following articles which may help with this: 

• If you accidentally deleted your calendars, bookmarks, or contacts from iCloud
• Restore contacts, calendars, bookmarks, and more using iCloud.com

Please let us know if you have follow-up questions about this issue, or if the issue remains unresolved. Have a great day!

That's definitely possible, paddypurcell. Try adding it back and see if the contacts return. If they do, you'll know the source of this issue. If they do not, we'd advise working through the articles linked above to recover those.

Thanks for getting back with us and take care.