Yes. Yoho Mobile sells a range of “Global F Unlimited” plans that give unlimited 4G data while you are in Bosnia and Herzegovina. The plans are available for 1‑day, 3‑day, 5‑day, 7‑day, 10‑day, 15‑day, 20‑day and 30‑day periods, with prices that range from $15.69 USD for the 1‑day option up to $449.07 USD for the 30‑day option. Each of these plans allows tethering and states that normal speed may be throttled, with the maximum listed speed capped at 5 Mbps.
Because the data is “unlimited” it is typically governed by a fair‑usage policy, meaning that after a substantial amount of data has been used the speed may be reduced. If you are particularly concerned about potential speed restrictions, it is a good idea to contact Yoho Mobile directly to confirm how the FUP is applied and what the typical data allowance remaining at normal speed would be.