Sync of contact problems - ipad to iCloud..

Welcome to the Apple Community.

1. First check that all your settings are correct, that contact syncing is checked on all devices (system preferences > iCloud on a mac and settings > iCloud on a iPhone, iPad or iPod).
2. Make sure the contacts you are adding are added to your 'iCloud' group and not an 'On My Mac', 'On My Phone' or other non iCloud group (you can do this by checking in groups), non iCloud contacts will not sync.
3. If you are sure that everything is set up correctly and your contacts are in the iCloud group, you might try unchecking contact syncing in the iCloud settings, restarting your device and then re-enabling contact syncing.

If you turn off iCloud contacts you should be asked if you want to keep them, you should choose yes. If you then turn on IiCloud contacts again, you should be asked if you want to merge them.

Unfortunately some users have reported that this does not always work.

If this is the case for you, then unfortunately you may be left with the only option of manually sharing them with yourself and importing them into your iCloud group.