Lateral saccades represent a major source of noise and confounds, particularly for event-related potentials (ERPs) that rely on hemispheric imbalances in neural activity elicited by lateralized stimuli during central fixation. These include lateralized ERPs such as the sustained posterior contralateral negativity (SPCN), which indexes visual working memory (VWM) load. Due to its relatively small amplitude and strict fixation requirement, the SPCN is particularly vulnerable to contamination from eye movements, which usually cause the contaminated trial to be discarded. In this context, independent component analysis (ICA) offers an alternative to the traditional epoch rejection method, as it removes ocular artifacts without discarding entire trials. However, ICA’s effectiveness may be limited if saccade-related activity is not fully removed or if stimulus timing undermines the lateralization required for SPCN measurement. In the present study, we compared the efficacy of ICA and epoch rejection in preserving SPCN features when participants were allowed to saccade. Participants were asked to memorize an array composed of a variable number of laterally displayed colored squares. In half of the experiment, participants had to keep their gaze at fixation, whereas they had to saccade towards the memoranda in the other half. The memory array was displayed for either 100 ms or 500 ms to examine how the post-saccade physical availability of the memoranda influenced SPCN amplitude and latency. The results were clear-cut in showing that, relative to epoch rejection, ICA correction preserved both quality and features of SPCN component. Notably, the post-saccade physical availability of the memoranda affected the latency of the SPCN, with shorter offset latency observed when the memoranda were exposed for 500 ms compared to 100 ms, likely reflecting post-saccade retinotopic remapping of the memoranda.