With the rapid advancement of design and manufacturing technologies of nano-scale CMOS circuits, latches are becoming increasingly sensitive to multiple-node-upsets caused by harsh radiation effects. In this paper, a Parallel Dual-interlocked-storage-cells (DICEs) and Dual-level C-elements (CEs) based 3-node-upset (3NU)-Tolerant Latch, namely PDDCTL, design for highly robust computing, is proposed. The latch comprises five transmission gates, two DICEs and three CEs. Due to the use of two single-node-upset self-recoverable DICEs and three error-interceptive CEs, the latch can provide complete 3NU-tolerance with low cost. Simulation results not only confirm the 3NU-tolerance of the proposed latch but also demonstrate that the delay-power-area product of the PDDCTL latch is reduced by 68.82% on average compared with the state-of-the-art 3NU hardened latch designs.