Overcautious
/ˌəʊvərˈkɔːʃəs/
Definition 1 of 1
Pro Tip 1/3Negative Nuance
Using 'overcautious' implies negativity, suggesting more caution than necessary, possibly hindering action. 
He was overcautious about investing, missing many opportunities.
Pro Tip 2/3Cultural Perceptions
In certain cultures, being overcautious is seen as a lack of confidence or assertiveness. 
Her overcautious approach to negotiations made her seem unprepared.
Pro Tip 3/3Non-Physical Context
'Overcautious' can also apply to non-physical situations, like being overly careful with words. 
He was overcautious in his email, constantly revising to avoid offending anyone.