Sun in third house is in the house of his friend Mars. Sun does well here provided the horoscope sign is favorable. Sun along with Mercury is excellent in third house and can make for a wonderful writer or television personality.

     According to B.V. Raman, Sun in third house makes the native courageous and resourceful. He/She is successful in life. An afflicted Sun in third house could suggest siblings who are either weak both physically and financially or do not share nice relationship with native. Also an afflicted Sun is very likely to give bad media publicity. As long as Sun is good there is success in communication field, chance of working in media and entertainment sectors and also possibility of gaining via short travels. The native could also make a fortune out of writing a novel. The sole aspect of Sun on the ninth house is great for foreign travels, spirituality and higher studies as long as ninth house does not contain enemy planets or sign. In case there is an enemy sign or planet in ninth house than there can be troubles via foreign travels. 

     Sun in third house is a good placement. Natives who have bad relationship with siblings and neighbors should regularly read Ramayana. They should never try to show their brothers, sisters and neighbors in bad light. They should keep ego in check if they are in the media and entertainment industry.