economical with the truth
US /ˌiːkəˈnɑːmɪkl wɪð ðə truːθ/
UK /ˌiːkəˈnɑːmɪkl wɪð ðə truːθ/

1.
to not tell the complete truth; to lie or mislead someone by omitting important facts
:
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The politician was accused of being economical with the truth during the interview.
•
When asked about the missing funds, the accountant was clearly economical with the truth.