The phrase "incomplete information" means that there is not enough or missing information to fully understand something or make a decision about it. Full definition
Too many court rulings are based on incomplete information because of the lack of cooperation, preparation, and diligence. (mediationplan.com)
There are additional improvements including fixing an issue that could cause Phone app to display incomplete information in the call list. (techtimes.com)
This leaves patients ill - equipped and with incomplete information regarding their condition. (thyroidpharmacist.com)