Hello @ramintavassoli,
Welcome to the TechForum Community. For this JST part BM03B-SRSS-TBT(LF)(SN), to find the 3D model you will have to use the part number BM03B-SRSS-TB instead. The additional T suffix adds the suction cap/kapton tape option. For suffix reference see post JST Kapton Tape/Suction Cap (TF, TB, TFT, TBT Suffix) - Support / Part Numbering - Engineering and Component Solution Forum - TechForum │ Digi-Key (digikey.com).
The 3D model can be found here SH Connector | JST Sales America.
Thank you!