A liquid-crystal compound satisfying at least one physical property such as a high clearing point, large dielectric anisotropy and excellent compatibility with other liquid-crystal compounds is described; a liquid-crystal composition containing the compound; and a liquid-crystal display device.The compound is represented by formula (1): wherein, R1 and R2 are independently alkyl having 1 to 15 carbons, and in the alkyl, at least one —CH2— may be replaced by —O—, —CH═CH— or the like; ring A1, ring A2 and ring A3 are independently 1,4-cyclohexylene, 1,4-phenylene or the like, and at least one ring A1, ring A2 or ring A3 is represented by formula (A): wherein, X1 and X2 are independently hydrogen or halogen; and Z1, Z2 and Z3 are independently a single bond, —(CH2)2— or the like; and a, b and c are independently 0 or 1, and a sum of a, b and c is 1, 2 or 3.