This paper reports the first realization of single-shot readout of a nuclear spin in silicon carbide (SiC). The study demonstrates a high-fidelity readout of a nuclear spin using a silicon vacancy (V2) center in 4H-SiC. The nuclear spin is strongly coupled with the V2 center, and the readout is achieved through a series of quantum operations. The single-shot readout fidelity is 98.2% with a measurement duration of 1.13 ms. Using a dual-step readout scheme, the fidelity is improved to 99.5% with a success efficiency of 89.8%. The nuclear spin is initialized using a swap gate between the electron and nuclear spin, and the readout is performed by mapping the nuclear spin state onto the electron spin through controlled not (CNOT) operations. The readout is then performed by measuring the electron spin state. The study also shows that the nuclear spin has a long coherence time, making it a promising candidate for quantum memories. The results demonstrate the potential of SiC for quantum networks and quantum information processing. The study highlights the importance of crystal engineering and cavity enhancement in improving the readout fidelity and speed. The results pave the way for high-fidelity nuclear photon entanglement and quantum networks.This paper reports the first realization of single-shot readout of a nuclear spin in silicon carbide (SiC). The study demonstrates a high-fidelity readout of a nuclear spin using a silicon vacancy (V2) center in 4H-SiC. The nuclear spin is strongly coupled with the V2 center, and the readout is achieved through a series of quantum operations. The single-shot readout fidelity is 98.2% with a measurement duration of 1.13 ms. Using a dual-step readout scheme, the fidelity is improved to 99.5% with a success efficiency of 89.8%. The nuclear spin is initialized using a swap gate between the electron and nuclear spin, and the readout is performed by mapping the nuclear spin state onto the electron spin through controlled not (CNOT) operations. The readout is then performed by measuring the electron spin state. The study also shows that the nuclear spin has a long coherence time, making it a promising candidate for quantum memories. The results demonstrate the potential of SiC for quantum networks and quantum information processing. The study highlights the importance of crystal engineering and cavity enhancement in improving the readout fidelity and speed. The results pave the way for high-fidelity nuclear photon entanglement and quantum networks.