The labour union suspended the planned 18 days of strike action - scheduled to begin on Thursday - by nearly 48,000 of its members to put the tentative agreement to a vote by its members.
The vote will take place from May 22 to 27, union leader Choi Seung-ho told reporters.
An earlier notice posted on the union's website had said it would happen from May 23 to 28.
Samsung Electronics said in a separate statement that the two parties had reached a tentative agreement on wages and collective bargaining and pledged to "build mature and constructive labour-management relations".
The 11th-hour deal came after days of talks that broke down multiple times, including earlier on Wednesday when the union announced that it would go ahead with the strike.
Talks restarted later in the day after South Korean Labour Minister Kim Young-hoon stepped in to mediate.
The two sides had been at odds over how performance bonuses would be distributed between the conglomerate's hugely profitable memory business and loss-making logic chip businesses, Reuters has previously reported.
Choi said they had agreed on how to distribute profit to loss-making businesses and would publish details of the tentative plan on the union's website shortly.
He expects the union members to approve the wage deal, he added.
"We will do our utmost to stabilise labor-management relations at Samsung Electronics going forward," he said.
Samsung accounts for almost a quarter of South Korea's exports and is also the world's largest memory chip maker so production disruptions risk fuelling price rises at a time when the AI boom has caused shortages.
