If you wish to delete your Instagram account on an iPhone, you must do so through your phone's web browser rather than the app.

However, you can temporarily disable your Instagram account on an iPhone using the Instagram application.

Only a web browser is required to delete an Instagram account. Here's how to delete your Instagram account on an iPhone.

Delete your Instagram account:  1. To begin, open your iPhone's Safari or any other web browser. 2. Go to http://instagram.com/accounts/remove/request/permanent

3. Enter your username, email address, and password to log into your account.  4. After signing in, Instagram asks you, why you want to delete your Instagram account.

5. You will be asked to enter your password again after selecting the reason. After that, go to the bottom and tap "Permanently delete my account."

6. Before your account is completely terminated, you will be asked if you are sure. If so, select "OK." Tap "OK" and your account will be deleted.

Your account will be permanently deleted, and you will no longer be able to access it. You can also make your account inactive.