1st of all we will see what happens when Ascendant Lord placed in 3rd house-
Its a good combination for artistic capabilities, normally natal is known for his/her capabilities related to music, artistic nature, as mathematician, linked with media, publications. Asc. Lord in 3rd house provides courage to natal, a different aura will be seen on natal. is supposed to enjoy all type of virtues, intelligent etc.and supposed to be a happy person.
But if Ascendant lord is afflicted, or in Debli sign as Sun in Libra (unless neech bhang yog is there), can give adverse impact.