Yes, if you act in time. During the first 24 hours you can stop the deletion yourself in the app. After that, you can ask Support to reactivate it within 30 days. After 30 days, the account is permanently deleted and can't be restored.
I started deleting my account less than 24 hours ago
Open Settings, then Account Management, then Delete Your Account, and tap Stop Account Deletion. Your account stays as it was.
My account says it has been deactivated
When you log in to a deleted account, Highrise shows "The account you are trying to login to has been deactivated." To ask for it back:
On the same device, log in to another Highrise account you own, or create a new one.
Open Settings, then Support Center.
Say you want to reactivate a deleted account and give its exact username.
Answer Support's questions so they can confirm you own it.
Support only restores accounts for the person who owns them, and can't promise a result.
What if more than 30 days have passed?
The account can't be restored. Its username, login methods, items, and Gold are removed when the 30 days end, and Support can't bring them back.
Someone else deleted my account
If you didn't start the deletion, contact Support the same way and say so. Then follow I think my account was hacked once you're back in.
Can I get a refund for purchases on a deleted account?
See the Highrise Refund Policy.