Well Did you submit your deletion? Do you have Editions? If you have Edition with that Branch, you can do a iwupdate. Did you submit your branch before?You can Retrieve from your staging if you have submitted your DCTs.Explain more one what you have done?Thanks
If after deletion,you have not submitted then well You can retrieve it.I hope if you have accidentally deleted the templatedata folder then I hope you have not submitted it.isint it?Thanks,