Mercury rules 12th and 3rd house is in 12th house in Gemini

Mercury in the 12th house in Gemini sign can have varying effects depending on the other planets and aspects involved in the birth chart. However, generally speaking, this placement may indicate that the individual has a strong interest in spirituality, philosophy, and the metaphysical realm.

They may also possess excellent intuition and the ability to read people's thoughts and emotions, which can be useful in professions such as counseling or psychology.

However, this placement may also indicate a tendency towards restlessness and anxiety, particularly regarding finances and material possessions. The individual may need to focus on grounding themselves and practising mindfulness to avoid getting caught up in racing thoughts and negative self-talk.

Overall, this placement suggests that the individual has the potential to tap into their intuition and connect with the divine. With proper self-care and attention to their mental and emotional wellbeing, they can use these gifts to lead a fulfilling and spiritually rewarding life.