Not only can that be done but, using content controls instead of formfields, the second and third dependent dropdowns can be programmed so they're not available until their preceding one has been updated and such that the updates omit the already-selected item. See, for example: https://www.msofficeforums.com/word-... dropdown list. For a demonstration of creating the initial dependent dropdown, see: Help with cascading dropdown list

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]