No, they can intersect in line. Consider the floor of a cuboid room and one wall. They meet in a line along the floor. Consider the plane that goes from that line to the line joining the opposite wall to the ceiling - a plane which goes diagonally across the room. The floor, first wall and the diagonal plane will be three points meeting in a line.
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There are two possible answers; if the line is crossing the plane at an angle, then the line and the plane only intersect at one point. However, if the line is part of the plane, then the entire line intersects with the plane, and there are an infinite number of intersecting points.
A tangent line.
It is a tangent line
It is a tangent line
Only one plane can contain three specific points.