No, you cannot deduct the value of fair market rent not charged to a charity.
According to the IRS, you would be claiming a deduction for income you didn’t receive. Rather, the advantage to you is that the rent that otherwise would be included in gross income for federal income tax purposes isn’t received and, as a result, not taxed.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"