The answer depends on "90 days before 3 years" of what? If you mean "90 days before the 3-d anniversary of marriage" then the answer is "No". At the time of submitting N-400 under the 3-year rule, you must be married for at least 3 years to a U.S. citizen spouse (the marriage must be at least 3 years old and the spouse must be a U.S. citizen for at least 3 years).
However, if the 3 year marriage requirement is satisfied at the time of application, you are allowed to submit N-400 up to 90 days before satisfying the continuous residency requirement.
E.g. if you got married to a U.S. citizen on Jan 1, 2007 but only obtained a green card on March 1, 2007, you are allowed to submit N-400 on Jan 1, 2010.