Kane has scored twice in six outings so far this season, but is without a goal in five games for club and country and endured another frustrating night during Tuesday's 2-1 Champions League defeat to Inter Milan.
However, Lamela is confident that Spurs have enough players to share the goalscoring burden when Kane does not find the net.
"Harry is not a machine. He scores a lot. He always scores. Here he didn't and for two or three games he didn't. But he will score again," Lamela told reporters.
"It's not like Harry needs to score every single game. Christian [Eriksen] scored, I scored in the last game. Sonny (Son Heung-min) will score. Lucas [Moura] will score. All the pressure is not on Harry. All the attacking players need to score. And that's it.
"I don't think we're losing our confidence. We believe in each other in this team. That's why we always fight until the end of the season. Of course, now you're thinking like this. But inside the dressing room, I can tell you it's not like this.
"We believe in this team. It's time to win again. This will help a lot, but we have confidence in ourselves. We're disappointed because we were winning and to lose like this in the last 10 minutes is bad. It's bad for us because we came here to win and in the end we didn't get the points, so very disappointed."
Spurs have now lost three consecutive games for the first time under Mauricio Pochettino.