I had a CT done on my abdominal area and it found a 3mm non calcified subpleural nodule seen posterolaterally in the left lower lobe. Thoughts?

Frequent finding. Ct's frequently show "incidental" findings. In most cases, they do not represent any serious disease. Often your radiologist and physician will recommend some follow-up, such as repeating the ct in about 3 months to make sure the nodule isn't growing (ie a possible cancer, rather than old scar). If you are at high risk for lung cancer (a smoker), more tests might be ordered immediately.
Nodulle in lung. You need to see a pulmonary speacialist as soon as possible to further investigate this nodule it needs to be biopsied through cat guided biopsy or through bronchoscopy.