The trio of Ahmed Musa, Alex Iwobi and Shehu Abdullahi, have arrived at the Super Eagles’ camp in Asaba.
The players’ arrival on Wednesday afternoon, has brought the number of players in camp to 23.
Only Shanghai Shenhua striker Odion Ighalo and Udinese defender William Troost-Ekong are still expected.
Nigeria will play Zimbabwe in a friendly game at the Stephen Keshi Stadium, Asaba on Saturday, as part of their preparation for 2019 Africa Cup of Nations in Egypt.
After the game, Gernot Rohr is expected to name his final 23-man squad for the tournament.
The three-time African champions will then depart for Ismaila, Egypt on Sunday to continue their preparations.